“We study this fish primarily for neuroscience, because they’re so small and transparent,” says Verity Cook at Charité – Berlin University Medicine in Germany. But the fish are so loud ...

The ghost catfish transforms from glassy to glam when white light passes through its mostly transparent body. Now, scientists know why. The fish’s iridescence comes from light bending as it ...

Having more than just one male fish fertilize the eggs is a species ... Over time, its population declines, as the small, clear mountain streams they need decline. Their decline helps contribute ...