Guppies are a small, pretty species of fish that are extremely popular for home aquariums. While they’re fun in captivity, in the wild they can cause major trouble. Native to South America, guppies ...

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Thanks to a unique combination of biology and ecology, the guppies have provided researchers with insights into evolution for decades. Evans and Fitzpatrick have pushed those insights a step further, ...

In a new study, researchers found that female guppies often choose a mate that physically stands out from the rest of the pack because of a common type of learning called habituation. Through ...

Trinidadian guppies behave like matadors, focusing a predator's point of attack before dodging away at the last moment, new research shows. The tiny fish (10-40mm) draw attention by turning their ...

Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion.