blue channel cat vs blue channel catfish

blue channel cat and blue channel catfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue channel cat	Yes	No	No	No
blue channel catfish	Yes	No	No	No

As nouns, blue channel cat and blue channel catfish are synonyms defined as:

blue channel cat and blue channel catfish: a large catfish of the Mississippi valley

Other synonyms of blue channel cat include blue cat, blue catfish.

blue channel cat (noun)	blue channel catfish (noun)
a large catfish of the Mississippi valley	a large catfish of the Mississippi valley