Alopiidae vs fish family

Alopiidae and fish family both are nouns.

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

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

Alopiidae (noun)	fish family (noun)
thresher sharks	any of various families of fish