ladyfish vs Tarpon atlanticus

ladyfish and Tarpon atlanticus both are nouns.

Word	Noun	Adjective	Verb	Adverb
ladyfish	Yes	No	No	No
Tarpon atlanticus	Yes	No	No	No

As nouns, Tarpon atlanticus is a hypernym of ladyfish; that is, Tarpon atlanticus is a word with a broader meaning than ladyfish:

ladyfish: game fish resembling the tarpon but smaller
Tarpon atlanticus: large silvery game fish of warm Atlantic coastal waters especially off Florida

Other hypernyms of ladyfish include tarpon.

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