kelp greenling vs Hexagrammos decagrammus

kelp greenling and Hexagrammos decagrammus both are nouns.

Word	Noun	Adjective	Verb	Adverb
kelp greenling	Yes	No	No	No
Hexagrammos decagrammus	Yes	No	No	No

As nouns, kelp greenling and Hexagrammos decagrammus are synonyms defined as:

kelp greenling and Hexagrammos decagrammus: common food and sport fish of western coast of North America

kelp greenling (noun)	Hexagrammos decagrammus (noun)
common food and sport fish of western coast of North America	common food and sport fish of western coast of North America