Definition of kelpfish
: any of various fishes inhabiting kelp beds: such as a : a large variably colored blenny (Heterostichus rostratus) found among kelp or eelgrass along the California coast or another member of the family Clinidae b : any of several brilliantly colored percoid fishes of the family Odacidae found along the coasts of Australia and New Zealand —called also rock whiting
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