Pacific sardine vs Sardinops caerulea

Pacific sardine and Sardinops caerulea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pacific sardine	Yes	No	No	No
Sardinops caerulea	Yes	No	No	No

As nouns, Pacific sardine and Sardinops caerulea are synonyms defined as:

Pacific sardine and Sardinops caerulea: small pilchards common off the pacific coast of North America

Pacific sardine (noun)	Sardinops caerulea (noun)
small pilchards common off the pacific coast of North America	small pilchards common off the pacific coast of North America