Catfish

wiktionary

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From cat +‎ fish. Likely so named for its prominent barbels like a cat's whiskers.

From the 2010 documentary Catfish, supposedly inspired by the practice of fishermen keeping cod active by storing them with catfish (see sense 1) which nip at their tails.

etymonline

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catfish (n.)

also cat-fish, name given to various types of fish, 1610s, probably in reference to the Atlantic wolf-fish, for its ferocity, from cat (n.) + fish (n.). The North American freshwater fish was so called by 1690s, probably for its "whiskers," or for the purring noise it is said to make when taken from the water.