Fish
Dusky Darter
Percina sciera · also called dusky darters
Propped motionless on its own pectoral fins in a deep stream pool, a dusky darter blends almost perfectly into the gravel below, larger than many of its darter relatives and content to wait until the moment is right for a short, quick burst toward its next meal.
Overview
The dusky darter, Percina sciera, is a comparatively large darter native to streams and rivers across a broad range of the south-central United States. Its notably substantial size for a darter, preference for deeper pools and runs, and characteristic fin-propped resting posture make it one of the more physically distinctive members of its typically small-bodied family.
A bigger fish in a small-bodied family
While many darter species stay small and confined to shallow riffles, the dusky darter has grown larger and moved into somewhat deeper water, carving out its own niche within a family generally defined by tiny size and fast, shallow habitat.
Status
Least Concern — widespread and stable across suitable stream and river habitat throughout the south-central United States.
Dusky Darter: common questions
Why does the dusky darter prop itself up on its fins?
This species often rests propped up on its pectoral fins while perched motionless on the bottom, a posture shared broadly across the darter family that helps it stay stable against current without continuously expending energy on active swimming, resuming movement only in short, quick bursts when foraging or avoiding a threat.
How is the dusky darter different from smaller darter species?
This species grows notably larger than several other darter species sharing similar habitat, a comparatively substantial size within the generally small-bodied darter family, and it also tends to favour somewhat deeper pools and runs rather than the shallow riffles many smaller darter species specialise in.
What does the dusky darter eat?
This species feeds on aquatic insect larvae and other small invertebrates, picked directly from gravel and rocky substrate on the streambed, a foraging style typical of darters generally that relies on short bursts of movement rather than continuous active swimming.
Where does the dusky darter live?
This species is native to streams and rivers across a broad range of the south-central United States, generally favouring somewhat deeper pools and runs compared with the shallow riffle habitat many other darter species prefer.