Citharichthys vs fish genus

Citharichthys and fish genus both are nouns.

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

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

Citharichthys: a genus of Bothidae, containing some of the large-tooth flounders, sanddabs, whiffs, and flounders (Citharichthys)
fish genus: any of various genus of fish

Citharichthys (noun)	fish genus (noun)
a genus of Bothidae, containing some of the large-tooth flounders, sanddabs, whiffs, and flounders (Citharichthys)	any of various genus of fish