stromateid vs percoid fish

stromateid and percoid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
stromateid	Yes	No	No	No
percoid fish	Yes	No	No	No

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

stromateid: small marine fish with a short compressed body and feeble spines
percoid fish: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of stromateid include percoid, percoidean.

stromateid (noun)	percoid fish (noun)
small marine fish with a short compressed body and feeble spines	any of numerous spiny-finned fishes of the order Perciformes