Menticirrhus vs fish genus

Menticirrhus and fish genus both are nouns.

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

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

Menticirrhus (noun)	fish genus (noun)
kingfishes; whiting	any of various genus of fish