genus Trachinotus vs fish genus

genus Trachinotus and fish genus both are nouns.

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

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

genus Trachinotus: a genus of Carangidae, containing the jacks and pompanos (Trachinotus)
fish genus: any of various genus of fish

genus Trachinotus (noun)	fish genus (noun)
a genus of Carangidae, containing the jacks and pompanos (Trachinotus)	any of various genus of fish