genus Percina vs fish genus

genus Percina and fish genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Percina	Yes	No	No	No
fish genus	Yes	No	No	No

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

genus Percina (noun)	fish genus (noun)
a genus of Percidae	any of various genus of fish