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Fish starting with S

Browse all 258 fish starting with S. Select a name to explore its species profile.

Browse fish A–Z

1,481 species

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Fish starting with S

258 fish
Underwater side-profile illustration of Sabine Shiner (Notropis sabinae).

Sabine Shiner

A freshwater shiner native to the United States, associated with Gulf-draining river systems.

Underwater side-profile illustration of Sacramento Blackfish (Orthodon microlepidotus).

Sacramento Blackfish

A freshwater fish native to California, with introduced populations in Nevada.

Underwater side-profile illustration of Sacramento Perch (Archoplites interruptus).

Sacramento Perch

Native to California and introduced to additional waters elsewhere in the western United States.

Underwater side-profile illustration of Sacramento Pikeminnow (Ptychocheilus grandis).

Sacramento Pikeminnow

Native to several California basins, including the Sacramento–San Joaquin, Russian River, Clear Lake and upper Pit River.

Underwater side-profile illustration of Sacramento Sucker (Catostomus occidentalis).

Sacramento Sucker

Uses habitats ranging from small headwater streams to deep lakes and estuaries.

Underwater side-profile illustration of Saddleback Darter (Percina vigil).

Saddleback Darter

Eats river snails and aquatic insect larvae, including caddisflies, midges and mayflies.

Underwater side-profile illustration of Saddleback Snapper (Paracaesio kusakarii).

Saddleback Snapper

A western Pacific snapper ranging from Singapore toward Samoa, with populations around Taiwan, Japan and northeastern Australia.

Underwater side-profile illustration of Saddled Madtom (Noturus fasciatus).

Saddled Madtom

Known from two small tributaries along the lower Tennessee River.

Underwater side-profile illustration of Saddletail Snapper (Lutjanus malabaricus).

Saddletail Snapper

Ranges through the Indian Ocean and western Pacific, extending toward Fiji and Japan.

Underwater side-profile illustration of Saffron Cod (Eleginus gracilis).

Saffron Cod

Uses shallow coastal waters, usually less than about 200 feet deep.

Underwater side-profile illustration of Saffron Darter (Etheostoma flavum).

Saffron Darter

Native to streams and creeks in Kentucky and Tennessee.

Underwater side-profile illustration of Saffron Shiner (Notropis rubricroceus).

Saffron Shiner

Lives in cold, clear, rocky streams of the Tennessee River drainage.

Underwater side-profile illustration of Sailfin Catfish (Pterygoplichthys multiradiatus).

Sailfin Catfish

Native to Venezuela’s Orinoco basin. Uses streams, lakes and weedy canals with muddy bottoms.

Underwater side-profile illustration of Sailfin Flyingfish (Parexocoetus brachypterus).

Sailfin Flyingfish

A tropical flyingfish found across the Indo-Pacific and parts of the eastern Pacific, including waters off Mexico and Ecuador.

Underwater side-profile illustration of Sailfin Molly (Poecilia latipinna).

Sailfin Molly

Uses both freshwater and brackish waterways along the eastern United States coast.

Underwater side-profile illustration of Sailfin Shiner (Pteronotropis hypselopterus).

Sailfin Shiner

A small shiner native to southeastern United States freshwater habitats.

Underwater side-profile illustration of Sailor Flyingfish (Prognichthys sealei).

Sailor Flyingfish

An Indo-Pacific flyingfish reaching Hawaii, with additional populations in eastern Pacific waters from Mexico toward Peru.

Underwater side-profile illustration of Salt Creek Pupfish (Cyprinodon salinus).

Salt Creek Pupfish

Native to Salt Creek in California’s Death Valley, where it survives in an isolated desert waterway.

Underwater side-profile illustration of Saltmarsh Topminnow (Fundulus jenkinsi).

Saltmarsh Topminnow

Lives in coastal wetlands along the United States Gulf of Mexico shoreline.

Underwater side-profile illustration of Salvin's Cichlid (Cichlasoma salvini).

Salvin’s Cichlid

Lives in Atlantic-draining rivers of southern Mexico, Belize and Guatemala.

Underwater side-profile illustration of San Marcos Gambusia (Gambusia georgei).

San Marcos Gambusia

A likely extinct livebearer formerly found only around San Marcos Springs in central Texas.

Underwater side-profile illustration of Sand Roller (Percopsis transmontana).

Sand Roller

Native to the Columbia River drainage in the northwestern United States.

Underwater side-profile illustration of Sand Seatrout (Cynoscion arenarius).

Sand Seatrout

A seatrout of the western Atlantic and Gulf coastal region.

Underwater side-profile illustration of Sand Shiner (Notropis stramineus).

Sand Shiner

Schools in clear, sandy streams, feeding on insects, microscopic algae and organic material near the bottom.

Underwater side-profile illustration of Sand Tiger (Carcharias taurus).

Sand Tiger

Uses continental-shelf habitats from sandy coastal areas to submerged reefs and deeper offshore water.

Underwater side-profile illustration of Sandbar Shiner (Notropis scepticus).

Sandbar Shiner

A shiner native to freshwater systems of the southeastern United States.

Underwater side-profile illustration of Sandhills Chub (Semotilus lumbee).

Sandhills Chub

Lives in the Carolina Sandhills, including parts of the Cape Fear, Pee Dee and Santee drainages.

Underwater side-profile illustration of Sandwich Island Sleeper (Eleotris sandwicensis).

Sandwich Island Sleeper

A Hawaiian sleeper found in freshwater, brackish and marine habitats around the islands’ coasts.

Underwater side-profile illustration of Santa Ana Sucker (Pantosteus santaanae).

Santa Ana Sucker

Grazes algae and organic material from shallow streambeds covered with sand, gravel or cobbles.

Underwater side-profile illustration of Santee Chub (Cyprinella zanema).

Santee Chub

Native to the Cape Fear, Pee Dee and upper Santee river systems of the Carolinas.

Underwater side-profile illustration of Sargo (Anisotremus davidsonii).

Sargo

Ranges from central California to Baja California, with a separate population in the Gulf of California.

Underwater side-profile illustration of Satinfin Shiner (Cyprinella analostana).

Satinfin Shiner

Uses rivers and creeks from headwaters toward tidal reaches, including pools and riffles.

Underwater side-profile illustration of Saucereye Porgy (Calamus calamus).

Saucereye Porgy

Eats bottom-dwelling animals such as mollusks, marine worms, crabs, brittle stars and sea urchins.

Sauger with mottled bronze sides and a spotted spiny dorsal fin.

Sauger

A freshwater predator commonly associated with deep pools in large rivers.

Underwater illustration of Saugeye (Sander canadensis × Sander vitreus).

Saugeye

A sauger–walleye hybrid commonly stocked in inland waters for recreational fishing.

Underwater side-profile illustration of Savannah Darter (Etheostoma fricksium).

Savannah Darter

Uses gravel riffles and sandy or gravelly runs in creeks and small rivers.

Underwater side-profile illustration of Sawcheek Darter (Etheostoma serrifer).

Sawcheek Darter

Native to Atlantic coastal-plain waters from Virginia’s Great Dismal Swamp toward Georgia’s Altamaha River.

Underwater side-profile illustration of Scaled Sardine (Harengula jaguana).

Scaled Sardine

A coastal sardine ranging through the western Atlantic from the Gulf of Mexico south toward Brazil.

Underwater side-profile illustration of Scaly Sand Darter (Ammocrypta vivax).

Scaly Sand Darter

Uses sandy, slow-current streams in the coastal-plain portion of the Mississippi River basin.

Underwater illustration of Scaly Waryfish (Scopelosaurus harryi).

Scaly Waryfish

A deep-water North Pacific fish ranging from northern Japan and the Bering Sea toward Baja California and the Galapagos.

Underwater side-profile illustration of Scarlet Shiner (Lythrurus fasciolaris).

Scarlet Shiner

Lives in smaller streams with moderate flow over rocks, pebbles or gravel.

Underwater side-profile illustration of Scioto Madtom (Noturus trautmani).

Scioto Madtom

An extinct small catfish formerly recorded in Ohio’s Scioto River drainage.

Underwater side-profile illustration of Scrawled Filefish (Aluterus scriptus).

Scrawled Filefish

A tropical filefish with populations across the Atlantic, Indian and Pacific oceans.

Underwater side-profile illustration of Scrawled Sole (Trinectes inscriptus).

Scrawled Sole

A coastal flatfish found from the Bahamas and Caribbean toward southeastern Brazil.

Underwater side-profile illustration of Sea Lamprey (Petromyzon marinus).

Sea Lamprey

Native Atlantic populations use coastal river systems; introduced populations have affected the Great Lakes and Lake Champlain.

Underwater side-profile illustration of Seaboard Goby (Gobiosoma ginsburgi).

Seaboard Goby

A coastal goby recorded in relatively shallow water, roughly six to thirty feet deep.

Underwater side-profile illustration of Shadow Bass (Ambloplites ariommus).

Shadow Bass

Favors slow water over clean mud, sand, gravel or pebbles.

Underwater side-profile illustration of Sharksucker (Echeneis naucrates).

Sharksucker

A remora found in tropical and warm temperate seas, with a range excluding the eastern Pacific.

Underwater side-profile illustration of Sharpchin Flyingfish (Fodiator rostratus).

Sharpchin Flyingfish

An eastern Pacific flyingfish ranging from Baja California toward Peru, including the Galapagos and Clipperton Island.

Underwater side-profile illustration of Sharpfin Chubsucker (Erimyzon tenuis).

Sharpfin Chubsucker

A southeastern sucker native to Alabama, Mississippi, Louisiana and Florida.

Underwater side-profile illustration of Sharphead Darter (Nothonotus acuticeps).

Sharphead Darter

Native only to the Holston and Nolichucky river systems of the eastern United States.

Underwater side-profile illustration of Sharpnose Darter (Percina oxyrhynchus).

Sharpnose Darter

Favors flowing gravel runs and riffles in smaller freshwater rivers.

Underwater side-profile illustration of Sharpnose Puffer (Canthigaster rostrata).

Sharpnose Puffer

A small marine puffer ranging from South Carolina through the Caribbean toward Venezuela, usually under five inches long.

Underwater side-profile illustration of Sharpnose Shiner (Notropis oxyrhynchus).

Sharpnose Shiner

A Texas shiner whose native range is restricted to the upper Brazos River basin.

Underwater side-profile illustration of Sharptail Mola (Masturus lanceolatus).

Sharptail Mola

Eats jellyfish and other soft-bodied drifting animals, along with some fish, crustaceans and mollusks.

Underwater illustration of Shawnee Darter (Etheostoma tecumsehi).

Shawnee Darter

Uses shallow gravel riffles and rocky pools in headwaters, creeks and small rivers.

Underwater side-profile illustration of Sheefish (Stenodus leucichthys).

Sheefish

A large northern whitefish found in Alaska’s rivers and connected waters. Adults mainly feed on smaller fish.

Sheepshead with broad black vertical bars on a deep silver body.

Sheepshead

Ranges through the western Atlantic from Nova Scotia south toward southern Brazil.

Underwater side-profile illustration of Sheepshead Minnow (Cyprinodon variegatus).

Sheepshead Minnow

Uses salt marshes and estuaries along the eastern coasts of North and Central America.

Underwater side-profile illustration of Shield Darter (Percina peltata).

Shield Darter

Favors strong currents over gravel and rubble in moderately sized creeks.

Underwater side-profile illustration of Shimofuri Goby (Tridentiger bifasciatus).

Shimofuri Goby

An Asian goby that tolerates both freshwater and brackish conditions.

Underwater side-profile illustration of Shiner Perch (Cymatogaster aggregata).

Shiner Perch

Uses estuaries, lagoons and coastal streams from Alaska to Baja California.

Underwater side-profile illustration of Shoal Bass (Micropterus cataractae).

Shoal Bass

A river bass native to the southeastern United States, including waters in Florida and Georgia.

Underwater side-profile illustration of Shoal Chub (Macrhybopsis hyostoma).

Shoal Chub

Occupies flowing runs over sand and gravel in small and large rivers.

Underwater side-profile illustration of Shortband Herring (Jenkinsia stolifera).

Shortband Herring

A small herring found around southern Florida and in the Caribbean Sea.

Underwater side-profile illustration of Shortfin Molly (Poecilia mexicana).

Shortfin Molly

A livebearing molly of shallow, still or slow-moving freshwater and brackish habitats.

Underwater side-profile illustration of Shortfinned Eel (Anguilla obscura).

Shortfinned Eel

A Pacific eel ranging from eastern Australia and New Guinea toward the Tuamotu and Gambier islands.

Underwater side-profile illustration of Shorthead Redhorse (Moxostoma macrolepidotum).

Shorthead Redhorse

Feeds on bottom-dwelling invertebrates and also consumes plant material from the riverbed.

Underwater side-profile illustration of Shorthead Sculpin (Cottus confusus).

Shorthead Sculpin

Lives in the Columbia River drainage across the northwestern United States and British Columbia.

Underwater side-profile illustration of Shortjaw Cisco (Coregonus zenithicus).

Shortjaw Cisco

Eats crustaceans and insect larvae, then spawns on lake bottoms in autumn.

Underwater side-profile illustration of Shortnose Cisco (Coregonus reighardi).

Shortnose Cisco

A cisco formerly native to lakes Michigan, Huron and Ontario, now considered probably extinct.

Shortnose Gar with a short broad snout and an unspotted head.

Shortnose Gar

Uses quiet water in large rivers, backwaters, oxbow lakes and deep pools.

Underwater side-profile illustration of Shortnose Sturgeon (Acipenser brevirostrum).

Shortnose Sturgeon

Lives in Atlantic coastal rivers and nearby waters between Canada and Florida.

Underwater side-profile illustration of Shortnose Sucker (Chasmistes brevirostris).

Shortnose Sucker

Native to freshwater habitats in southern Oregon and northern California.

Underwater side-profile illustration of Shorttail Pipefish (Microphis manadensis).

Shorttail Pipefish

A western Pacific pipefish found from Indonesia toward the Philippines, Solomon Islands and Taiwan.

Representative illustration of Shoshone Sculpin facing left underwater, with dark mottling and banded fins.

Shoshone Sculpin

Lives in spring systems around Idaho’s Thousand Springs formation near Hagerman.

Underwater side-profile illustration of Shrimp Eel (Ophichthus gomesii).

Shrimp Eel

Uses muddy bottoms in the shallow Gulf of Mexico and nearby high-salinity bays.

Underwater side-profile illustration of Sickle Darter (Percina williamsi).

Sickle Darter

Feeds on small crayfish and mayflies, using its long snout to search for prey.

Underwater side-profile illustration of Silk Snapper (Lutjanus vivanus).

Silk Snapper

Ranges from North Carolina and Bermuda through the Caribbean and Gulf of Mexico toward southeastern Brazil.

Underwater side-profile illustration of Silver Anchovy (Engraulis eurystole).

Silver Anchovy

An anchovy recorded along the western Atlantic, including United States coasts, the Gulf of Mexico and northern South America.

Silver Carp with fine silver scales and a low-set eye.

Silver Carp

Native to China and eastern Siberia, from the Amur basin south toward the Xi Jiang system.

Underwater side-profile illustration of Silver Chub (Macrhybopsis storeriana).

Silver Chub

A freshwater chub with a native distribution in the United States and Canada.

Underwater side-profile illustration of Silver Jenny (Eucinostomus gula).

Silver Jenny

An Atlantic mojarra ranging from New Jersey and Bermuda through the Caribbean toward Argentina.

Underwater side-profile illustration of Silver Lamprey (Ichthyomyzon unicuspis).

Silver Lamprey

A lamprey distributed through the northern and central United States and much of southern Canada.

Underwater side-profile illustration of Silver Perch (Bairdiella chrysoura).

Silver Perch

A small coastal fish native to the Atlantic side of North America.

Underwater side-profile illustration of Silver Redhorse (Moxostoma anisurum).

Silver Redhorse

Often uses deep, sandy pools with little current in freshwater river systems.

Underwater illustration of Silver Sandfish (Kraemeria cunicularia).

Silver Sandfish

A small sandfish ranging from Southeast Asia toward Palau and Vanuatu, with records around Japan and northern Australia.

Underwater side-profile illustration of Silver Seatrout (Cynoscion nothus).

Silver Seatrout

A marine seatrout associated with relatively deep coastal water.

Underwater side-profile illustration of Silver Shiner (Notropis photogenis).

Silver Shiner

Recorded in western Lake Erie tributaries and Ontario’s Grand River system.

Underwater side-profile illustration of Silverband Shiner (Notropis shumardi).

Silverband Shiner

Lives in the Mississippi and major tributaries, with additional populations in several Gulf-draining systems.

Underwater side-profile illustration of Silverjaw Minnow (Ericymba buccata).

Silverjaw Minnow

A United States stream minnow whose populations occupy separated portions of its overall range.

Underwater side-profile illustration of Silverstripe Shiner (Notropis stilbius).

Silverstripe Shiner

Widespread in the Mobile Bay drainage across Mississippi, Alabama, Tennessee and Georgia.

Underwater side-profile illustration of Skipjack Herring (Alosa chrysochloris).

Skipjack Herring

Uses flowing water that ranges from clear to moderately cloudy.

Underwater illustration of Slabrock Darter (Etheostoma smithi).

Slabrock Darter

Uses rocky pools in small rivers and streams, as well as rocky edges of larger waterways.

Underwater side-profile illustration of Slackwater Darter (Etheostoma boschungi).

Slackwater Darter

Associated with stream bottoms of clean silt, sand and fine gravel.

Underwater illustration of Slender Chub (Erimystax cahni).

Slender Chub

A freshwater chub native to the Clinch and Powell rivers in the eastern United States.

Underwater side-profile illustration of Slender Filefish (Monacanthus tuckeri).

Slender Filefish

A slender marine filefish ranging from Bermuda and North Carolina through the Caribbean toward Colombia.

Underwater side-profile illustration of Slender Madtom (Noturus exilis).

Slender Madtom

Uses flowing pools and riffles in smaller streams, over coarse gravel and flat rock slabs.

Representative illustration of Slender Sculpin facing left underwater, with an elongated pale mottled body.

Slender Sculpin

Lives along lake margins and in stream riffles, runs and pools over mud, sand or gravel.

Underwater side-profile illustration of Slender Wenchman (Pristipomoides freemani).

Slender Wenchman

A slender snapper ranging from the southern Caribbean Sea toward southern Brazil.

Underwater side-profile illustration of Slenderhead Darter (Percina phoxocephala).

Slenderhead Darter

Eats insect larvae and other small invertebrates. Spawns during spring and early summer.

Underwater illustration of Slimstripe Dartfish (Parioglossus taeniatus).

Slimstripe Dartfish

A dartfish recorded around Madagascar, the Seychelles, the Philippines, Palau, Fiji and northeastern Australia.

Underwater side-profile illustration of Slimy Sculpin (Cottus cognatus).

Slimy Sculpin

Uses cold, rocky streams and lakes across northern North America, including the Great Lakes region.

Underwater side-profile illustration of Slough Anchovy (Anchoa delicatissima).

Slough Anchovy

An anchovy native to Pacific coastal waters of southern California and Baja California.

Underwater side-profile illustration of Slough Darter (Etheostoma gracile).

Slough Darter

Favors slow to moderate currents over soft mud, silt or sand.

Underwater side-profile illustration of Smalleye Shiner (Notropis buccula).

Smalleye Shiner

Found naturally only in the upper Brazos River basin of Texas.

Smallmouth Bass with bronze sides and dark vertical bars.
Featured

Smallmouth Bass

Native to the upper Mississippi, Great Lakes–St. Lawrence and Hudson Bay systems, including the Champlain region.

Underwater side-profile illustration of Smallmouth Buffalo (Ictiobus bubalus).

Smallmouth Buffalo

A large freshwater sucker native to Mississippi tributaries and several surrounding river systems.

Underwater side-profile illustration of Smallmouth Flounder (Etropus microstomus).

Smallmouth Flounder

A small marine flatfish with both eyes positioned on the left side of its body.

Approximate underwater illustration of Smallmouth x Spotted Bass; hybrid appearance varies.

Smallmouth x Spotted Bass

A smallmouth–spotted bass cross, combining two freshwater bass commonly associated with rocky waterways.

Underwater side-profile illustration of Smallscaled Goby (Oxyurichthys microlepis).

Smallscaled Goby

A tropical coastal goby ranging from Africa across the Indian Ocean into the western Pacific, using saltwater and brackish habitats.

Underwater side-profile illustration of Smalltooth Jobfish (Aphareus furca).

Smalltooth Jobfish

Recorded around western Pacific islands, including Micronesia, the Solomon Islands, Fiji and Raja Ampat.

Underwater side-profile illustration of Smoky Madtom (Noturus baileyi).

Smoky Madtom

Uses the transitions between pools and riffles, spawning beneath large, flat rocks in summer.

Underwater side-profile illustration of Smooth Butterfly Ray (Gymnura micrura).

Smooth Butterfly Ray

A coastal ray recorded along northern and eastern South America and the Atlantic coast of western Africa.

Underwater illustration of Smooth Clingfish (Gobiesox nudus).

Smooth Clingfish

A small coastal clingfish found around the Bahamas, Caribbean islands and northern South America.

Underwater side-profile illustration of Smooth Flounder (Liopsetta putnami).

Smooth Flounder

Lives in shallow inshore saltwater and brackish habitats, extending to depths of roughly ninety feet.

Underwater side-profile illustration of Smooth Puffer (Lagocephalus laevigatus).

Smooth Puffer

A marine puffer that feeds on fish and shrimp, using its strong mouth to handle animal prey.

Underwater side-profile illustration of Snail Bullhead (Ameiurus brunneus).

Snail Bullhead

A bullhead catfish widely distributed in southeastern United States freshwater habitats.

Underwater side-profile illustration of Snail Darter (Percina tanasi).

Snail Darter

Uses sand and gravel shoals in larger creeks, rivers and reservoirs.

Underwater illustration of Snakehead Gudgeon (Ophieleotris aporos).

Snakehead Gudgeon

A gudgeon recorded around Indonesia, the Philippines, Palau, the Solomon Islands and nearby southwestern Pacific islands.

Sockeye Salmon with a red body and green head in spawning male coloration.

Sockeye Salmon

A Pacific salmon native to the North Pacific and rivers that drain into it.

Underwater side-profile illustration of Sonora Chub (Gila ditaenia).

Sonora Chub

Eats aquatic and land insects, along with algae growing in larger stream pools.

Underwater side-profile illustration of Sonora Sucker (Catostomus insignis).

Sonora Sucker

Tolerates varied flowing-water habitats, from cool trout streams to warm rivers.

Underwater illustration of Sooty Darter (Etheostoma olivaceum).

Sooty Darter

Lives in stream and creek pools together with neighboring riffles.

Underwater side-profile illustration of Sordid Snapper (Paracaesio sordida).

Sordid Snapper

A snapper ranging from the Red Sea and western Indian Ocean islands toward the Marquesas, Pitcairn and New Caledonia.

Underwater side-profile illustration of Southern Brook Lamprey (Ichthyomyzon gagei).

Southern Brook Lamprey

A southern lamprey recorded from Arkansas and Louisiana east through Mississippi, Alabama and Georgia.

Underwater side-profile illustration of Southern Cavefish (Typhlichthys subterraneus).

Southern Cavefish

An underground fish associated with caves and limestone groundwater systems in the eastern United States.

Southern Flounder with a mottled brown upper side without ringed eyespots while resting on sand.

Southern Flounder

Native to the eastern United States coast and northern Gulf of Mexico.

Underwater side-profile illustration of Southern Logperch (Percina austroperca).

Southern Logperch

Lives in the Escambia and Choctawhatchee river systems of western Florida and southern Alabama.

Underwater side-profile illustration of Southern Puffer (Sphoeroides nephelus).

Southern Puffer

A warm-water puffer recorded in the Caribbean and neighboring western Atlantic habitats.

Underwater side-profile illustration of Southern Sailfin Catfish (Pterygoplichthys anisitsi).

Southern Sailfin Catfish

A South American armored catfish native to the Paraná and Uruguay drainages. Introduced populations also occur outside its home range.

Underwater side-profile illustration of Southern Stingray (Dasyatis americana).

Southern Stingray

A coastal ray ranging through warm western Atlantic waters from New Jersey toward southern Brazil.

Underwater illustration of Southern Striped Raphael (Platydoras armatulus).

Southern Striped Raphael

An armored catfish native to South America’s Amazon, Paraguay–Paraná and lower Orinoco basins.

Underwater side-profile illustration of Spangled Gudgeon (Ophiocara porocephala).

Spangled Gudgeon

A tropical gudgeon with a native distribution in the Indo-Pacific region.

Underwater illustration of Speckled Chub (Macrhybopsis aestivalis).

Speckled Chub

A freshwater chub recorded in the United States and Mexico.

Underwater side-profile illustration of Speckled Dace (Rhinichthys osculus).

Speckled Dace

Ranges through western North American freshwater habitats from Sonora north to British Columbia.

Underwater side-profile illustration of Speckled Darter (Etheostoma stigmaeum).

Speckled Darter

Uses rocky or sandy pools in flowing streams and medium-sized rivers, including areas with fast currents.

Underwater side-profile illustration of Speckled Killifish (Fundulus rathbuni).

Speckled Killifish

A killifish native to freshwater habitats in southern Virginia and North Carolina.

Underwater side-profile illustration of Speckled Pavon (Cichla temensis).

Speckled Pavon

Native to the Orinoco, Rio Negro and parts of the central Amazon across northern South America.

Underwater side-profile illustration of Speckled Worm Eel (Myrophis punctatus).

Speckled Worm Eel

An Atlantic worm eel ranging from North Carolina and Bermuda through the Caribbean toward southern Brazil.

Underwater side-profile illustration of Specklefin Rockclimbing Goby (Sicyopus leprurus).

Specklefin Rockclimbing Goby

A stream goby recorded from southern Japanese islands toward New Guinea and northern Australia, with a marine larval stage.

Underwater side-profile illustration of Spikedace (Meda fulgida).

Spikedace

A small southwestern minnow recorded in Arizona and New Mexico.

Underwater side-profile illustration of Spiny Boxfish (Lactoria diaphana).

Spiny Boxfish

A spiny boxfish with a broad Indo-Pacific range and additional populations along the Pacific coast of the Americas.

Underwater side-profile illustration of Spinycheek Sleeper (Eleotris pisonis).

Spinycheek Sleeper

A coastal sleeper recorded from Venezuela and the southern Caribbean toward southern Brazil.

Underwater side-profile illustration of Splake (Salvelinus fontinalis × Salvelinus namaycush).

Splake

A brook trout–lake trout hybrid stocked in cold-water lakes for recreational fishing.

Underwater illustration of Splendid Darter (Etheostoma barrenense).

Splendid Darter

Often occupies small, rocky pools along the edges of creeks and rivers.

Underwater side-profile illustration of Splittail (Pogonichthys macrolepidotus).

Splittail

Native to low-elevation waterways in California’s Central Valley.

Underwater side-profile illustration of Spoonhead Sculpin (Cottus ricei).

Spoonhead Sculpin

Uses rock, rubble and submerged logs as shelter from larger predatory fish.

Underwater side-profile illustration of Spot (Leiostomus xanthurus).

Spot

Lives in coastal waters and estuaries from Massachusetts to Texas. A dark mark behind each gill gives it its name.

Underwater side-profile illustration of Spot Dascyllus (Dascyllus albisella).

Spot Dascyllus

A damselfish recorded in the east-central Pacific Ocean.

Underwater side-profile illustration of Spot Pom (Abudefduf sordidus).

Spot Pom

Eats algae, tiny animals and drifting plankton in its coastal habitat.

Underwater side-profile illustration of Spotfin Chub (Erimonax monachus).

Spotfin Chub

Uses clear, warm river stretches with steady flow resembling stream runs.

Underwater illustration of Spotfin Dragonet (Foetorepus agassizii).

Spotfin Dragonet

A bottom-dwelling dragonet recorded from the Caribbean Sea toward northern Brazil.

Underwater side-profile illustration of Spotfin Dualspot Goby (Redigobius roemeri).

Spotfin Dualspot Goby

A goby ranging from the Andaman Islands toward Palau, New Ireland, the Solomon Islands and northern Australia.

Underwater side-profile illustration of Spotfin Killifish (Fundulus luciae).

Spotfin Killifish

A killifish recorded in coastal and inland United States waters, plus Bermuda, Cuba and the Yucatán.

Underwater side-profile illustration of Spotfin Mojarra (Eucinostomus argenteus).

Spotfin Mojarra

A coastal mojarra recognizable by a dark spot on its dorsal fin.

Underwater side-profile illustration of Spotfin River Goby (Awaous ocellaris).

Spotfin River Goby

A river goby ranging from India toward Japan and Oceania, using freshwater, brackish and marine habitats.

Underwater side-profile illustration of Spotfin Shiner (Cyprinella spiloptera).

Spotfin Shiner

A shiner recorded from Quebec’s St. Lawrence drainage south toward Virginia’s Potomac River system.

Underwater illustration of Spotfin Snouted Goby (Pseudogobius javanicus).

Spotfin Snouted Goby

A coastal goby recorded around Malaysia, Singapore, Indonesia, the Philippines and southern Japan.

Underwater side-profile illustration of Spotfin Spiny Eel (Macrognathus siamensis).

Spotfin Spiny Eel

Favors slow backwaters, swamps, canals and ponds with sandy or muddy bottoms.

Underwater illustration of Spottail Darter (Etheostoma squamiceps).

Spottail Darter

Uses rocky pools and adjacent riffles in creeks and small rivers.

Underwater side-profile illustration of Spottail Pinfish (Diplodus holbrookii).

Spottail Pinfish

Feeds on plants and small invertebrates over flat, vegetated coastal bottoms, especially seagrass beds.

Underwater side-profile illustration of Spottail Shiner (Notropis hudsonius).

Spottail Shiner

A small minnow recorded in northeastern United States lakes and other northern freshwater habitats.

Underwater side-profile illustration of Spotted Barb (Puntius binotatus).

Spotted Barb

Feeds on tiny crustaceans, insect larvae and some plants in the lower portions of shallow water.

Spotted Bass illustration facing left underwater, with a dark lateral band and rows of spots below it.
Featured

Spotted Bass

Eats insects, crayfish and smaller fish. Native to the Mississippi basin and Gulf-draining waters from Texas toward the Florida Panhandle.

Underwater side-profile illustration of Spotted Bullhead (Ameiurus serracanthus).

Spotted Bullhead

Favors deeper river holes over rock or sand where currents are moderate.

Underwater illustration of Spotted Darter (Nothonotus maculatus).

Spotted Darter

Native to the Ohio River basin in the eastern United States.

Spotted Gar with round dark spots across the head, body and fins.

Spotted Gar

A North American gar covered with dark spots across its head, fins and long, narrow body.

Spotted Seatrout with round black spots on silver sides and tail.

Spotted Seatrout

Found along Gulf of Mexico coasts and the Atlantic shoreline between Maryland and Florida.

Underwater side-profile illustration of Spotted Sleeper (Eleotris picta).

Spotted Sleeper

A sleeper native to eastern Pacific coastal waters from southern California toward Peru, including the Gulf of California.

Underwater illustration of Spotted Sucker (Minytrema melanops).

Spotted Sucker

Lives in deep pools of smaller rivers over clay, sand or gravel.

Underwater illustration of Spotted Sunfish (Lepomis punctatus).

Spotted Sunfish

Ranges through coastal drainages from North Carolina’s Cape Fear region toward Florida’s Apalachicola River.

Underwater side-profile illustration of Spotted Tilapia (Tilapia mariae).

Spotted Tilapia

Native to freshwater and brackish habitats in western and central Africa.

Underwater side-profile illustration of Spottedtail Goosefish (Lophiodes caulinaris).

Spottedtail Goosefish

A seafloor anglerfish ranging from southern California toward Peru, including offshore islands and the Gulf of California.

Underwater side-profile illustration of Spring Cavefish (Forbesichthys agassizii).

Spring Cavefish

Lives in selected springs, seeps and caves from Kentucky toward south-central Tennessee.

Underwater side-profile illustration of Spring Pygmy Sunfish (Elassoma alabamae).

Spring Pygmy Sunfish

A tiny sunfish associated with springs near the Tennessee River in northern Alabama.

Underwater side-profile illustration of Squaretail Mullet (Liza vaigiensis).

Squaretail Mullet

An Indo-Pacific mullet ranging from eastern Africa toward Japan, Australia and remote French Polynesian islands.

Underwater side-profile illustration of Star Drum (Stellifer lanceolatus).

Star Drum

A small coastal drum found from Virginia to northern Florida and in the northern Gulf of Mexico.

Underwater side-profile illustration of Stargazing Minnow (Phenacobius uranops).

Stargazing Minnow

Lives in the Green, Cumberland and Tennessee river drainages across Kentucky and several neighboring southeastern states.

Underwater side-profile illustration of Starry Flounder (Platichthys stellatus).

Starry Flounder

A Pacific flatfish recorded along western North America, from Canadian waters into California.

Underwater illustration of Steelhead (Oncorhynchus mykiss).

Steelhead

An ocean-migrating form of rainbow trout that returns to freshwater rivers to spawn.

Underwater illustration of Stippled Darter (Etheostoma punctulatum).

Stippled Darter

Found in Ozark portions of the Missouri and White river drainages in Missouri and Arkansas.

Underwater side-profile illustration of Stippled Studfish (Fundulus bifax).

Stippled Studfish

Native to the Tallapoosa River system in Georgia and Alabama, including Alabama’s Sofkahatchee Creek.

Underwater illustration of Stone Darter (Etheostoma derivativum).

Stone Darter

Uses shallow pools and riffle edges over gravel and sand, especially where flat rocks provide shelter.

Underwater side-profile illustration of Stonecat (Noturus flavus).

Stonecat

A small catfish that uses rocky and gravelly bars, including shores exposed to wave action.

Underwater illustration of Streaked River Goby (Awaous grammepomus).

Streaked River Goby

Ranges from Sri Lanka toward New Guinea, using rivers, streams and brackish estuaries.

Underwater side-profile illustration of Streamline Chub (Erimystax dissimilis).

Streamline Chub

A freshwater chub native to eastern United States river systems.

Underwater side-profile illustration of Striated Frogfish (Antennarius striatus).

Striated Frogfish

An ambush predator found over sand and around rocky or coral reefs, from shallow water into deeper habitats.

Underwater illustration of Stripeback Darter (Percina notogramma).

Stripeback Darter

Uses gravel riffles and flowing runs in small and medium-sized rivers.

Underwater side-profile illustration of Striped Anchovy (Anchoa hepsetus).

Striped Anchovy

A western Atlantic anchovy recorded along the North American coast.

Striped Bass with silver sides with long dark horizontal stripes.
Featured

Striped Bass

Native to eastern North American coastal and river systems, with introduced populations in western reservoirs and other inland waters.

Underwater illustration of Striped Darter (Etheostoma virgatum).

Striped Darter

Uses rocky pools in headwater streams, creeks and smaller rivers.

Representative underwater illustration of Striped Fantail Darter.

Striped Fantail Darter

A striped fantail darter form recorded in small Illinois creeks, including waters near Quincy.

Underwater side-profile illustration of Striped Killifish (Fundulus majalis).

Striped Killifish

A shallow-water coastal killifish ranging from New Hampshire to Florida and into the northern Gulf of Mexico.

Underwater side-profile illustration of Striped Mojarra (Eugerres plumieri).

Striped Mojarra

A western Atlantic mojarra with a mainly continental coastal distribution.

Underwater side-profile illustration of Striped Mullet (Mugil cephalus).

Striped Mullet

An adaptable coastal mullet that also enters freshwater, where algae form part of its diet.

Underwater side-profile illustration of Striped Puffer (Arothron manilensis).

Striped Puffer

Uses shallow tropical Indo-Pacific estuaries, lagoons and sheltered reef tops.

Underwater side-profile illustration of Striped Shiner (Luxilus chrysocephalus).

Striped Shiner

Lives in rocky creek pools and upper or middle stream reaches, tolerating both clear and cloudy water.

Underwater side-profile illustration of Striped Snakehead (Channa striata).

Striped Snakehead

A snakehead native to South and Southeast Asia, with introduced populations on some Pacific islands.

Underwater side-profile illustration of Stripetail Darter (Etheostoma kennicotti).

Stripetail Darter

Lives in small rivers and streams across several central and southeastern United States states.

Underwater illustration of Stripetail Dartfish (Parioglossus rainfordi).

Stripetail Dartfish

A dartfish ranging from West Papua and New Guinea toward southern Japan, northern Australia and New Caledonia.

Underwater side-profile illustration of Sturgeon Chub (Macrhybopsis gelida).

Sturgeon Chub

A small river chub native to the United States, associated with central North American waterways.

Representative sucker facing left above a rocky streambed, showing its fleshy mouth and silver-olive scales.

Sucker

A sucker with its species unconfirmed. Most suckers gather food from the bottom using a downward-facing mouth.

Underwater illustration of Suckermouth Catfish (Hypostomus plecostomus).

Suckermouth Catfish

A tropical armored catfish native to northern South America, with introduced populations elsewhere.

Underwater side-profile illustration of Sufflamen bursa (Sufflamen bursa).

Sufflamen bursa

A reef triggerfish of the Indo-Pacific, including waters around Japan, Australia and Hawaii.

Underwater side-profile illustration of Sufflamen chrysopterum (Sufflamen chrysopterum).

Sufflamen chrysopterum

Uses tropical Indo-West Pacific reef habitats, including seaward reefs and nearby shallows.

Underwater side-profile illustration of Sufflamen fraenatum (Sufflamen fraenatum).

Sufflamen fraenatum

Ranges from Africa’s Indian Ocean coast through Indonesia toward the Hawaiian Islands.

Summer Flounder with a mottled upper side with ringed eyespots while resting on sand.

Summer Flounder

An Atlantic flatfish found off the eastern coasts of the United States and Canada.

Underwater side-profile illustration of Summer Sucker (Catostomus utawana).

Summer Sucker

A freshwater sucker associated with New York waterways.

Representative sunfish facing left underwater, with a blue-green cheek, dark gill flap and golden-orange breast.

Sunfish

An unidentified freshwater sunfish. This group includes small stream dwellers as well as familiar lake and pond panfish.

Representative Sunfish Hybrid illustration facing left underwater, with turquoise cheek markings and a golden-green body; hybrid appearance varies.

Sunfish Hybrid

A sunfish cross with unspecified parents. Color, size and growth can vary depending on the species involved.

Underwater side-profile illustration of Surf Smelt (Hypomesus pretiosus).

Surf Smelt

Eats marine worms, young fish and jellyfish in coastal waters.

Underwater side-profile illustration of Suwannee Bass (Micropterus notius).

Suwannee Bass

A bass originally native to just two river systems in Florida and Georgia.

Underwater side-profile illustration of Swamp Darter (Etheostoma fusiforme).

Swamp Darter

Recorded in Mississippi River tributaries north to Kentucky and southeastern Missouri.

Underwater side-profile illustration of Swamp Eel (Monopterus albus).

Swamp Eel

A freshwater eel-like fish native to East and Southeast Asia, where it is also used as food.

Underwater side-profile illustration of Swampfish (Chologaster cornuta).

Swampfish

Lives in Atlantic coastal-plain drainages from southeastern Virginia to central Georgia.

Underwater side-profile illustration of Swannanoa Darter (Etheostoma swannanoa).

Swannanoa Darter

Favors boulder-filled riffles in cool, clear mountain streams.

Underwater side-profile illustration of Swordspine Snook (Centropomus ensiferus).

Swordspine Snook

A small snook ranging from Florida through the Gulf of Mexico and Caribbean toward southeastern Brazil.

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