Identification
The long final dorsal-fin ray is the feature behind the name. A silvery body alone is not enough to distinguish this fish from sardines and other herrings. Look for that fin extension when examining an intact specimen.
Size and Weight
A Caribbean account reports 48 cm, about 18.9 inches, while a separate species summary lists 38 cm total length. The larger regional figure is labelled separately in Quick Facts. Published maximum weight is 375 g, approximately 13.2 ounces; it should not be assumed to belong to a 48 cm fish.
Habitat and Natural Food
Schools occur in shallow coastal waters and harbors. Feeding includes plankton filtering as well as small animal prey. A Campeche Bank study found that diet varied with season, reproductive condition and age, showing that one food list does not capture every population.
Fishery Role
Thread Herring is used as bait and in food fisheries. Its importance as prey and bait does not establish a rod-and-line method for catching it. Coastal schooling habitat is well supported; any inland-water association needs its own evidence.
The Thread That Names the Fish
A thin extension projects behind the dorsal fin. This small anatomical detail is easy to miss in a school viewed from shore, but it is useful when separating thread herrings from similar baitfishes at close range.
All Lakes With Atlantic Thread Herring
Browse lakes and reservoirs with documented Atlantic Thread Herring records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.
No published lakes are currently linked to this species in our confirmed records.