Guppies have been a separate species for 500,000 years, and during that time their color has changed drastically. But one thing has stayed the same: an orange patch on males. This is quite possibly ...

Tiny fish called Trinidadian guppies turn their eyes black to warn other fish when they are feeling aggressive, new research shows. Tiny fish called Trinidadian guppies turn their eyes black to warn ...

A variety of animals have male-specific ornament traits and these ornaments are favored by female choice. Which male traits are preferred by females often varies among females. Genetic mechanisms that ...

Here’s another advantage of having a big brain: you know how to choose the hottest mates. As it turns out, female guppies with bigger brains are smart enough to prefer attractive male guppies. Their ...

Researchers at Florida State University have recently discovered why female guppies, tiny tropical fish native to Central and South America, prefer males with unusual color patterns - and it has to do ...

Tiny fish called Trinidadian guppies turn their eyes black to warn other fish when they are feeling aggressive, new research shows. A study led by the University of Exeter, in collaboration with the ...