genus Clupea vs fish genus

genus Clupea and fish genus both are nouns.

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

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

genus Clupea (noun)	fish genus (noun)
type genus of the Clupeidae: typical herrings	any of various genus of fish