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.

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 ...

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 ...

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 ...

Are you thinking of keeping fish as pets but don’t know where to start? Take a look at two of the most popular choices for beginners - Guppy fish and Swordtail fish. Here are the reasons why these ...

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 ...

Guppy owners know to keep the lid on their aquarium tightly sealed. Otherwise, the colorful little fish will leap to their deaths. Possibly into a chai latte. That’s where one seemingly suicidal guppy ...

Female fish have become better swimmers in order to escape male sexual harassment, new research claims. The female guppies have learnt to shake off the unwanted male attention by changing their ...

Guppy fish can be one of the five most effective forms of dengue control, as these tiny fish can be placed in water vessels in and around homes, where they will eat the larvae of dengue-transmitting ...