We now know how ghost catfish get their rainbow shine. These small fish, popular for home aquariums because of their near-complete transparency, get their iridescence from fibres in their muscles, ...

NEW YORK — You can see right through this little aquarium fish from Thailand: Its skin is almost completely transparent. But when the light hits it just right, its body flickers with shimmering ...

Meet the telescopefish, a ghostly predator with tubular eyes and a jaw that unhinges to swallow prey larger than itself.

"This is the first time a fish in this family has ever been seen alive," said fishery biologist Dr. Bruce Mundy with the NOAA. "This is really an unusual sighting." Video of the eel-like fish was ...