Cichlids and stingrays can perform simple addition and subtraction in the number range of one to five as shown in a recent study.

It turns out these predators love to grab a nap when there’s nothing going on and some actually sleep with their eyes wide open!

Researchers have developed the first fully autonomous biohybrid fish from human stem-cell derived cardiac muscle cells.

Older women who eat more than one to two servings a week of baked or broiled fish or shellfish may counteract the effects of air pollution.

Fish are far more likely to communicate with sound than generally thought—and some fish have been doing this for at least 155 million years.

Researchers have found that using lighted nets greatly reduced accidental bycatch of sharks, rays, sea turtles, and unwanted finfish.

Near the Filchner Ice Shelf in the south of the Antarctic Weddell Sea, researchers found the world's largest fish breeding area known.

A trio of researchers at the University of Trento, in Italy, has found via experimentation that archerfish can distinguish between numbers.

Researchers engineered a robot to scare mosquitofish away, revealing how fear alters its behavior, physiology and fertility.

As we live and breathe, ancient-looking fish known as bowfin are guarding genetic secrets that that can help unravel humanity’s evolution

We've all heard of flying fish, but thousands of juvenile trout took a nosedive from an airplane as part of efforts to replenish lakes