tarpon vs Elops saurus

tarpon and Elops saurus both are nouns.

Word	Noun	Adjective	Verb	Adverb
tarpon	Yes	No	No	No
Elops saurus	Yes	No	No	No

As nouns, Elops saurus is a hyponym of tarpon; that is, Elops saurus is a word with a more specific, narrower meaning than tarpon:

tarpon: large silvery game fish of warm Atlantic coastal waters especially off Florida
Elops saurus: game fish resembling the tarpon but smaller

Other hyponyms of tarpon include ladyfish, tenpounder.

tarpon (noun)	Elops saurus (noun)
large silvery game fish of warm Atlantic coastal waters especially off Florida	game fish resembling the tarpon but smaller