These fish can change color based on social status, mood, and reproductive state. Dominant males often display more intense ...

A hogfish changes color when pigment-containing cells called chromatophores interact with light. When light hits them, they expand or contract, concentrating more or less pigment to create colors.

The red color of salmon flesh — their muscle tissue — is a unique trait in several types of salmon. It’s an evolved genetic trait that likely occurred as an evolutionary mutation and distinguishes ...

Red colors like the baby Yellowtail Coris help the fish hide in dark cracks of the reef because the red color is actually black when they are out of the sunlight.

This color change phenomenon is seen in other fish species too. In Trinidadian guppies (Poecilia reticulata), the eyes of dominant fish turn black when they are preparing to attack a rival.

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

Near a river in the Democratic Republic of the Congo sat a seasonal pond, formed during the wet season and already shrinking. Inside swam an “iridescent” creature with a “gem”-like pattern. Something ...

As the researchers demonstrates, says Neff, the fish are using a visual cue, a color in the divers’ suit. “And honestly, there's nothing particularly novel about that.” ...

It's difficult to give general care advice for fish as diverse as African cichlids. Get as much species-specific care information as you can from the place where you purchase your new aquatic pet.

Though technically not a fish, cuttlefish are mollusks that belong to the cephalopod class. Known for their incredible color-changing capabilities, cuttlefish use specialized skin cells called ...