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 ...

The purchase of the first aquarium brings a lot of excitement. Choosing the first pet is not always easy because of the ...

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.

See more of our trusted coverage when you search. 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 ...

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 ...

Spanish biologist Ignacio Paulin became fascinated by the behavior of these fish, in a project that could now disappear due to budget cuts by the Trump administration ...

Larvae-eating guppy fish can help combat the spread of dengue, a mosquito-borne illness giving rise to hundreds of thousands of severe cases including 20,000 deaths worldwide every year. Larvae-eating ...

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 ...