Noun
platyfish (plural platyfishes or platyfish)
Certain fish of the genus Xiphophorus lacking a sword-like extension of the lower tailfin.
The southern platyfish is commonly known simply as the platy (pl. platys or platies), from the fish’s original generic name, Platypoecilus. Source: Internet
The southern platyfish grows to a maximum overall length of convert. Source: Internet