Chelonia mydas vs green turtle

Chelonia mydas and green turtle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chelonia mydas	Yes	No	No	No
green turtle	Yes	No	No	No

As nouns, Chelonia mydas and green turtle are synonyms defined as:

Chelonia mydas and green turtle: large tropical turtle with greenish flesh used for turtle soup

Chelonia mydas (noun)	green turtle (noun)
large tropical turtle with greenish flesh used for turtle soup	large tropical turtle with greenish flesh used for turtle soup