Coryphaena hippurus vs dolphin

Coryphaena hippurus and dolphin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Coryphaena hippurus	Yes	No	No	No
dolphin	Yes	No	No	No

As nouns, dolphin is a hypernym of Coryphaena hippurus; that is, dolphin is a word with a broader meaning than Coryphaena hippurus:

Coryphaena hippurus: the more common dolphinfish valued as food; about six feet long
dolphin: large slender food and game fish widely distributed in warm seas (especially around Hawaii)

Other hypernyms of Coryphaena hippurus include dolphinfish, mahimahi.

Coryphaena hippurus (noun)	dolphin (noun)
the more common dolphinfish valued as food; about six feet long	any of various small toothed whales with a beaklike snout; larger than porpoises
	large slender food and game fish widely distributed in warm seas (especially around Hawaii)