blackmouth bass vs sea bass

blackmouth bass and sea bass both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackmouth bass	Yes	No	No	No
sea bass	Yes	No	No	No

As nouns, sea bass is a hypernym of blackmouth bass; that is, sea bass is a word with a broader meaning than blackmouth bass:

blackmouth bass: small marine fish with black mouth and gill cavity
sea bass: any of various food and sport fishes of the Atlantic coast of the United States having an elongated body and long spiny dorsal fin

blackmouth bass (noun)	sea bass (noun)
small marine fish with black mouth and gill cavity	any of various food and sport fishes of the Atlantic coast of the United States having an elongated body and long spiny dorsal fin
	the lean flesh of a saltwater fish of the family Serranidae