Endlers or Endler’s livebearers, are small fish native to the Paria Peninsula in Venezuela. They are prolific breeders and often hybridize with guppies, giving birth to live young approximately every 23 days.

The colors of Endler’s livebearer males are very intense, especially the black, orange, and metallic green colors. Their natural patterns are highly variable, though many display a double-sword tail.