Ghost sharks are cartilaginous fish, related to sharks and rays ... although their exact size remains unclear. "Their deep-sea habitat makes them difficult to study and monitor, so we know ...

Scientists have spotted a deep-sea “ghost” white shark with a rare genetic ... The shark caught off Albania, described in a study in the Journal of Fish Biology, has less pigmentation ...

A deep-sea neutrino telescope has detected the most energetic neutrino ever recorded. The particle, known as a "ghost particle," was about 30 times more active than the previous record-holder.

Look, here comes a blobfish! This thrilling deep-sea fish was voted the world's ugliest animal by the Ugly Animal Preservation Society. But its jelly-like skin looks much more natural at 900 meters.

But when they’re swimming around their deep-sea habitats, they look like fairly standard fish, with wide heads that taper back toward slender tails. Why such a drastic change in appearance?