genus Oligoplites vs fish genus

genus Oligoplites and fish genus both are nouns.

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

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

genus Oligoplites (noun)	fish genus (noun)
leatherjackets	any of various genus of fish