jawfish vs percoid

jawfish and percoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
jawfish	Yes	No	No	No
percoid	Yes	No	No	No

As nouns, percoid is a hypernym of jawfish; that is, percoid is a word with a broader meaning than jawfish:

jawfish: small large-mouthed tropical marine fishes common along sandy bottoms; males brood egg balls in their mouths; popular aquarium fishes
percoid: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of jawfish include percoid fish, percoidean.

jawfish (noun)	percoid (noun)
small large-mouthed tropical marine fishes common along sandy bottoms; males brood egg balls in their mouths; popular aquarium fishes	any of numerous spiny-finned fishes of the order Perciformes