genus Priacanthus vs fish genus

genus Priacanthus and fish genus both are nouns.

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

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

genus Priacanthus (noun)	fish genus (noun)
type genus of the Priacanthidae	any of various genus of fish