genus Calamus vs fish genus

genus Calamus and fish genus both are nouns.

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

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

genus Calamus (noun)	fish genus (noun)
a genus of Sparidae, containing porgies (Calamus)	any of various genus of fish
distinctive often spiny-stemmed palms found as climbers in tropical and subtropical forest