词条 | wels |
释义 | wels fish also called waller (species Silurus glanis) ![]() It is a long-bodied, scaleless fish, usually mottled greenish to blackish with a pale belly and dark fins. It has a long anal fin, a small dorsal fin near the large, flattened head, and six mouth barbels, two of which, on the upper jaw, are very long. A nocturnal predator, the wels feeds on fish, frogs, water birds, and occasional small mammals. It is an important food fish and a fine sport fish. |
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