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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the setting in which something occurs

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