Serranidae vs fish family

Serranidae and fish family both are nouns.

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

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

Serranidae (noun)	fish family (noun)
marine fishes: sea basses, sea perches, groupers, jewfish	any of various families of fish