A rare oarfish, often called the "doomsday fish," was spotted in Mexico—just days after another deep-sea creature, a deep-sea ...

The book is unquestionably popular with kids, who seem to gravitate toward the fish’s iridescent foil scales. More than 30 million copies of The Rainbow Fish have sold worldwide, according to ...

These unique fish have the nickname "iridescent shark catfish," a seemingly ... As for iridescence, river catfish have no scales, but their delicate skin is covered with a protective layer of ...