family Siluridae vs fish family

family Siluridae and fish family both are nouns.

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

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

family Siluridae (noun)	fish family (noun)
Old World catfishes	any of various families of fish