giant scallop vs Pecten magellanicus

giant scallop and Pecten magellanicus both are nouns.

Word	Noun	Adjective	Verb	Adverb
giant scallop	Yes	No	No	No
Pecten magellanicus	Yes	No	No	No

As nouns, giant scallop and Pecten magellanicus are synonyms defined as:

giant scallop and Pecten magellanicus: a large scallop inhabiting deep waters of the Atlantic coast of North America

Other synonyms of giant scallop include sea scallop.

giant scallop (noun)	Pecten magellanicus (noun)
a large scallop inhabiting deep waters of the Atlantic coast of North America	a large scallop inhabiting deep waters of the Atlantic coast of North America