Alopius vs fish genus

Alopius and fish genus both are nouns.

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

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

Alopius: type genus of the family Alopiidae; in some classifications considered a genus of the family Lamnidae
fish genus: any of various genus of fish

Alopius (noun)	fish genus (noun)
type genus of the family Alopiidae; in some classifications considered a genus of the family Lamnidae	any of various genus of fish