Fin's Fish Guide
The Mottled sculpin (Cottus bairdii) is a freshwater fish of the family Cottidae that grows up to 15 cm.
Fresh water of North America, in clear, cool, fast-flowing streams and rivers with stony bottoms.
Description
The mottled sculpin is a stocky bottom fish of the family Cottidae (sculpins) reaching about 15 cm. The body has a broad, flat head, large, fan-shaped pectoral fins and a brown, marbled pattern, good camouflage among stones. Because the species lacks a swim bladder it stays on the bottom and moves in short hops. It is native to the fresh water of North America and lives in clear, cool, fast-flowing streams and rivers with stony bottoms. Mainly at night it ambushes insect larvae, small crustaceans, small fish and fish eggs. In spring the male guards the eggs stuck to the underside of a stone. It is a sensitive indicator of clean, cold water.
Frequently asked questions
How do you recognise the Mottled sculpin?
The Mottled sculpin has an elongate, eel-like body, is mainly brown and shows a marbled pattern. Small stocky bottom fish with a broad, flat head, large pectoral fins and a marbled pattern; lacks a swim bladder and stays on the bottom.
Where does the Mottled sculpin live?
The Mottled sculpin lives in fresh water and is mostly found around stony or rocky ground. Fresh water of North America, in clear, cool, fast-flowing streams and rivers with stony bottoms.
How big does the Mottled sculpin get?
The Mottled sculpin grows to a maximum of about 15 cm. On average the species is around 8 cm.
Is the Mottled sculpin dangerous to humans?
No, the Mottled sculpin is harmless to humans. None required: this species is harmless to humans.
Is the Mottled sculpin edible?
The Mottled sculpin is not usually eaten.
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All data
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Behaviour & biology
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Status & sources
Same genus Cottus
More from the family Cottidae
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