genus Acipenser vs fish genus

genus Acipenser and fish genus both are nouns.

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

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

genus Acipenser (noun)	fish genus (noun)
type genus of the Acipenseridae: sturgeons	any of various genus of fish