Roccus vs fish genus

Roccus and fish genus both are nouns.

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

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

Roccus: a genus of Serranidae, including the common marine striped bass (Roccus)
fish genus: any of various genus of fish

Roccus (noun)	fish genus (noun)
a genus of Serranidae, including the common marine striped bass (Roccus)	any of various genus of fish