Guppies are beginner-friendly, low-maintenance fish that thrive in a 10-gallon tank, with a peaceful temperament and omnivorous diet. Males are smaller with vibrant colors, while females are larger ...

Guppies can be fooled by optical illusions into believing objects are smaller or larger than they really are. This suggests they might not always make the best choices in their natural environment.

For female guppies, there’s more to life than making babies. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content. A new study finds that guppies ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. How people respond to stressful situations can say a lot about their personalities—and it turns out the same is true of a ...

We specialize in freshwater tropical fish, aquatic plants, and the overall betterment of the freshwater fish keeping hobby. Our goal is to help you with your first pet fish and graduate you to an ...

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 ...

Sexual harassment is a burden that females of many species face, and some may go to extreme lengths to avoid it. Female guppies, a popular aquarium fish, may even risk their lives to avoid too much ...

Jaymi Heimbuch is a writer and photographer specializing in wildlife conservation, technology, and food. She is the author of "The Ethiopian Wolf: Hope at the Edge of Extinction." Let's face it, some ...

When Robert Heathcote dips his head into the rivers of Trinidad, he’ll often see little black dots moving through the water, even when it’s murky. Those dots are the eyes of small, inch-long fish ...

Tiny guppy fish change their eye colour to warn off rivals, new research shows. When facing an opponent, Trinidadian guppies rapidly turn their irises from silver to black before attacking their ...