green swordtail
xiphophorus hellerii latin

The type species is X. hellerii, the Green swordtail.

One species was the green swordtail; the male's body is about three inches long and has a three-inch sword-like extension from its rear fin.

The green swordtail prefers swift-flowing, heavily-vegetated rivers and streams, but is also found in warm springs and canals.

A live-bearer, it is closely related to the green swordtail (X. helleri) and can interbreed with it.

The two species are members of the same genus, but the platyfish is considered more primitive, a kind of living progenitor of the green swordtail.

Xiphophorus hellerii (Green swordtail)

Graphium tynderaeus, the Electric Green Swordtail, is a butterfly in the Papilionidae family.

The green swordtail (Xiphophorus hellerii) is a species of freshwater fish in family Poeciliidae of order Cyprinodontiformes.

Three species and their hybrids are common in the aquarium trade: the Green swordtail, the Southern platyfish (X. maculatus) and the Variable platyfish (X. variatus).

One of the most popular tropical aquarium fish, the green swordtail has been bred into various hybrid forms for the aquarium hobby due to its hardiness and suitability for community tanks.

Several introduced, predatory aquatic species, including the green swordtail fish Xyphophorus helleri, the American bullfrog Rana catesbiana, the wrinkled frog Rana rugosa, and the cane toad Bufo marinus potentially threaten populations of Newcomb's snail.