fin whale vs Balaenoptera physalus

fin whale and Balaenoptera physalus both are nouns.

Word	Noun	Adjective	Verb	Adverb
fin whale	Yes	No	No	No
Balaenoptera physalus	Yes	No	No	No

As nouns, fin whale and Balaenoptera physalus are synonyms defined as:

fin whale and Balaenoptera physalus: large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific

Other synonyms of fin whale include common rorqual, finback, finback whale.

fin whale (noun)	Balaenoptera physalus (noun)
large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific	large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific