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any of the slim, bottom-dwelling fish of the family Triglidae, found in warm and temperate seas of the world. Sea robins are elongated fish with armoured, bony heads and two dorsal fins. Their pectoral fins are fan-shaped, with the bottom few rays each forming separate feelers. These feelers are used by the fishes in "walking" on the bottom and in sensing mollusks, crustaceans, and other bottom-dwelling prey.