family Liparidae vs fish family

family Liparidae and fish family both are nouns.

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

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

family Liparidae (noun)	fish family (noun)
snailfishes	any of various families of fish