Carcharhinus vs fish genus

Carcharhinus and fish genus both are nouns.

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

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

Carcharhinus (noun)	fish genus (noun)
type genus of the Carcharhinidae	any of various genus of fish