Pomacentridae vs fish family

Pomacentridae and fish family both are nouns.

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

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

Pomacentridae (noun)	fish family (noun)
damselfishes	any of various families of fish