serranid fish vs percoidean

serranid fish and percoidean both are nouns.

Word	Noun	Adjective	Verb	Adverb
serranid fish	Yes	No	No	No
percoidean	Yes	No	No	No

As nouns, percoidean is a hypernym of serranid fish; that is, percoidean is a word with a broader meaning than serranid fish:

Other hypernyms of serranid fish include percoid, percoid fish.

serranid fish (noun)	percoidean (noun)
marine food sport fishes mainly of warm coastal waters	any of numerous spiny-finned fishes of the order Perciformes