The "flashier" a male guppy is, the more likely a female guppy will choose him as a mate, giving him the opportunity to pass his genes along to the next generation. This is sexual selection at ...

This image shows a female and two male guppies (Poecilia reticulata) from the Arima River, Trinidad. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted ...