Identification
Two dusky side stripes can merge into a broad dark band on a large male. Small black specks mark the upper body, and breeding colors may include bright red underneath and yellow fins. Older scientific accounts use the genus Phoxinus.
Size and Weight
A species account reports a maximum total length of 7.6 cm, about 3 inches. A Forest Service study plotted fish weighing up to approximately 3.6 g in one creek sample. That approximate weight was read from the published measurement figure, not calculated from its regression equation, and is not a verified worldwide record.
Habitat and Natural Food
Rocky pools in small headwaters provide habitat, especially around undercut banks, large rocks and accumulated organic material. Attached algae and immature aquatic insects supply food. Field surveys have found populations concentrated in pools rather than distributed evenly through every stream section.
Observation and Conservation
The appropriate emphasis is understanding and conserving its limited stream habitat. A general lake name can obscure the particular tributary where the fish was documented. No species-specific angling method is recommended for this conservation-focused profile.
Bright Colors in a Small Headwater Fish
The male’s contrasting black and red pattern can be striking during the breeding period. Outside that appearance, the paired side stripes and speckled back remain useful details for recognizing the species.
All Lakes With Blackside Dace
Browse lakes and reservoirs with documented Blackside Dace 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.