Scomberomorus vs fish genus

Scomberomorus and fish genus both are nouns.

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

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

Scomberomorus (noun)	fish genus (noun)
Spanish mackerels	any of various genus of fish