helleri vs Xyphophorus helleri

helleri and Xyphophorus helleri both are nouns.

Word	Noun	Adjective	Verb	Adverb
helleri	Yes	No	No	No
Xyphophorus helleri	Yes	No	No	No

As nouns, helleri and Xyphophorus helleri are synonyms defined as:

helleri and Xyphophorus helleri: freshwater fish of Central America having a long swordlike tail; popular aquarium fish

Other synonyms of helleri include swordtail, topminnow.

helleri (noun)	Xyphophorus helleri (noun)
freshwater fish of Central America having a long swordlike tail; popular aquarium fish	freshwater fish of Central America having a long swordlike tail; popular aquarium fish