Add Yahoo as a preferred source to see more of our stories on Google. A male celebes medaka with black markings starting to appear towards the end of its tail. Dominant males of an Indonesian species ...

University of Otago—Ōtākou Whakaihu Waka scientists have discovered that it takes mere minutes for a species of sex-changing fish to develop dominant behavior after a change in the pecking order. The ...

Fish weight in the western North Pacific Ocean dipped in the 2010s due to warmer water limiting food supplies, according to a new study. Researchers analyzed the individual weight and overall biomass ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. America's rivers are changing rapidly due to climate change, and fish ...

We’ve long marveled at color-changing critters like squid, chameleons, cuttlefish, and others as they flash brilliant hues. Animals across species possess this ability for a suite of reasons, ...

Without a mirror, it can be hard to tell if you're blushing, or have spinach in your teeth. But one color-changing fish has evolved a clever way to keep watch on the parts of itself that lie outside ...

Hogfish are the chameleons of the Atlantic Ocean, seamlessly changing their skin color depending on their environment. As if those morphing skills weren't impressive enough, these reef dwellers can ...

A recent study evaluates the impacts on the Amazonian tambaqui fish from simultaneous exposure to a mix of pesticides and an extreme climate change scenario. Researchers subjected the fish to higher ...

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 ...