Gadus vs fish genus

Gadus and fish genus both are nouns.

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

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

Gadus (noun)	fish genus (noun)
type genus of the Gadidae: the typical codfishes	any of various genus of fish