blackfish vs Tautoga onitis

blackfish and Tautoga onitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackfish	Yes	No	No	No
Tautoga onitis	Yes	No	No	No

As nouns, blackfish and Tautoga onitis are synonyms defined as:

blackfish and Tautoga onitis: large dark-colored food fish of the Atlantic coast of North America

Other synonyms of blackfish include tautog.

blackfish (noun)	Tautoga onitis (noun)
female salmon that has recently spawned	large dark-colored food fish of the Atlantic coast of North America
small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school
large dark-colored food fish of the Atlantic coast of North America