The Guppy, also known as the “millionfish,” is one of the most popular freshwater aquarium fish in the world. It is native to eastern South America (Venezuela Guyana, Brazil) and several adjacent island groups (Barbados, Netherlands Antilles, Trinidad and Tobago, the US Virgin Islands). Wild fish generally are found in small streams and ponds but can tolerate a range of water conditions.
The pet trade features a wide variety of guppies. The plain-looking "wild" guppy is very hardy and breeds quickly in captivity. Selective breeding by aquarists has also created "fancy” guppies. These are highly variable in appearance, featuring a range of bright colors and graceful fan-like or spiked tails.