In a simulation or in the wild, where predators are plentiful, male guppies become increasingly drab over generations, pushed by predation pressure toward greater camouflage. So if camouflage ...

The male guppies that were depicted in this sexual selection model only begin to demonstrate the vast range of colors and patterns expressed by wild guppies. Below are some examples of wild ...

These are two male Trinidadian guppies, showing the range of color patterns observed in the population. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases ...

In 2016, researchers took 3,600 male guppies (Poecilia reticulata) from Alligator Creek in North Queensland to study whether any fish had been contaminated with fluoxetine. They found no ...