Mobula hypostoma vs manta

Mobula hypostoma and manta both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mobula hypostoma	Yes	No	No	No
manta	Yes	No	No	No

As nouns, manta is a hypernym of Mobula hypostoma; that is, manta is a word with a broader meaning than Mobula hypostoma:

Mobula hypostoma: small manta (to 4 feet) that travels in schools
manta: extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned

Other hypernyms of Mobula hypostoma include devilfish, manta ray.

Mobula hypostoma (noun)	manta (noun)
small manta (to 4 feet) that travels in schools	extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
	a blanket that is used as a cloak or shawl