family Gerreidae vs Percomorphi

family Gerreidae and Percomorphi both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Gerreidae	Yes	No	No	No
Percomorphi	Yes	No	No	No

family Gerreidae (noun)	Percomorphi (noun)
mojarras	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna