genus Scomber vs fish genus

genus Scomber and fish genus both are nouns.

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

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

genus Scomber (noun)	fish genus (noun)
type genus of the Scombridae	any of various genus of fish