Guppies are tiny, easy-care fish that grow up to 1.6 inches (4 centimeters) long. They like to live with other guppies and are social, active fish. Males are known to harass females, so it’s ...

The blobfish went viral with this photo, but underwater they look like a completely different fish. They sustain tissue damage when they're brought from the ocean's depths to the surface.

To test their hunch, Jordan and his colleagues traveled to the French Mediterranean island of Corsica, where they designed experiments involving two different fish species: saddled sea bream (O.

They decided to go after two completely different fish. The year’s first tuna auctions traditionally ignite high-priced bidding wars because the fish are highly coveted as a sign of good luck.