Priacanthidae vs fish family

Priacanthidae and fish family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Priacanthidae	Yes	No	No	No
fish family	Yes	No	No	No

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

Priacanthidae: small carnivorous percoid fishes found worldwide in tropical seas
fish family: any of various families of fish

Priacanthidae (noun)	fish family (noun)
small carnivorous percoid fishes found worldwide in tropical seas	any of various families of fish