Ophidiidae vs fish family

Ophidiidae and fish family both are nouns.

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

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

Ophidiidae (noun)	fish family (noun)
eellike marine fishes	any of various families of fish