Carcharhinidae vs fish family

Carcharhinidae and fish family both are nouns.

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

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

Carcharhinidae: largest family of living sharks; found worldwide especially in tropical waters; dorsal fin lacks spines: requiem sharks including tiger sharks and soupfin sharks
fish family: any of various families of fish

Carcharhinidae (noun)	fish family (noun)
largest family of living sharks; found worldwide especially in tropical waters; dorsal fin lacks spines: requiem sharks including tiger sharks and soupfin sharks	any of various families of fish