Dominant males of an Indonesian species of fish turn black during periods of heightened aggression, scientists have discovered. Their blackened markings, which quickly emerge at the start of a ...

Among aquarium enthusiasts who keep bettas, it is usually the male fish that are known as the "colorful ones." Oftentimes the males are favored over the females not only for their color, but also ...

When fish suddenly change color, there are little photoreceptors embedded deep within their skin keeping watch to ensure the color is just right, according to new research. For the first time, ...

When Lorian E. Schweikert, Ph.D., reeled in a hogfish on a fishing trip to the Florida Keys, she noticed something strange after setting it down on the deck of the boat. Hogfish are known for their ...

Deep-diving fish have a problem: The only light that penetrates their watery environment is blue and green hardly enough of a palette for flashy color patterns. Now, a new study reveals these fishes' ...

A newly discovered visual system in deep-sea fish could allow them to discern predators from prey in the low-light conditions found at the bottom of the ocean, new research suggests. A team led by ...

New research reveals signs of highly sensitive color vision in fish that live in the abyss beyond sunlight's reach An international team of researchers discovered a previously unknown visual system ...

The fish may have evolved the ability to see in color at depth by using rod cells instead of cone cells to detect light. In the dim light of dusk, the world appears gray. That's because we, like most ...