DAN GURAVICH / SCIENCE PHOTO LIBRARY DAN GURAVICH / SCIENCE PHOTO LIBRARY
Channel catfish (Ictalurus punctatus). This fish inhabits clean streams, rivers and lakes in North America, from southern Canada to Mexico. It has a varied diet that includes fish, crustaceans, molluscs, aquatic insects and small mammals. Its mouth is surrounded by sensitive barbels (long feelers), which help it to find prey. It can reach a length of nearly 150 centimetres, and is valued as a food fish. It has been the subject of aquaculture (fish farming), and some escapes have led to it becoming a pest in some areas.
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