genus Coregonus vs fish genus

genus Coregonus and fish genus both are nouns.

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

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

genus Coregonus (noun)	fish genus (noun)
type genus of the Coregonidae: whitefishes	any of various genus of fish