Central Mottled Sculpin

Central Mottled Sculpin (Cottus bairdi)

A frog-faced fish requiring fast flowing currents, the Mottled Sculpin is one of the most unique fishes found in Ohio's fast-flowing stream habitats.

They prefer the swifter currents of clean streams characterized by low levels of siltation, cool temperatures, and high dissolved oxygen levels. The Mottled Sculpin belongs to a family of fishes called Cottidae. Their large heads and heavy, tapered bodies reflect the bottom-oriented habits of this particular family of fishes.

Sculpins spend their entire lives nestled among riffles feeding on various benthic macro-invertebrates, preferably chironomids, mayfly nymphs, and stonefly larvae. In Ohio, populations of the Mottled Sculpin are centered primarily around the glacial boundary and the glacial moraines of west-central Ohio where high gradient, spring-fed streams provide ideal habitat conditions for this species. They are largely absent from unglaciated Ohio away from this boundary with the exception of streams found on the Flushing Escarpment in eastern Ohio.

The Bass Island region of Lake Erie once supported a large population of sculpins. But this population was extirpated in the 1950's along with most of the other bottom dwelling organisms as a result of the accelerated eutrophication and pollution occurring at that time.

Inland, local populations have been extirpated due to habitat destruction and increased rates of siltation observed in many Ohio streams. In eastern Ohio, acid mine drainage from strip-mining continues to be a problem.