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.

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 ...

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 ...

SAN FRANCISCO — Lions and tigers and bears and… guppies? Don't let its tiny size, delicate tail or fondness for aquarium life fool you; a new chemical analysis places the guppy high up on the food ...

There’s something oddly calming about watching fish move through water. No notifications, no noise, no rush – just a small ...

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 ...

A lot of people expect fish to just drift around the tank and mind their business. Then they notice certain species waiting ...

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Meet Poecilia vivipara—a small, shiny yellow guppy found in South America. When a group of scientists visited the Fernando de Noronha archipelago a decade ago, they found the tiny freshwater fish.