Fish

An angular roughshark pulled from the water near Elba, an Italian island near Tuscany.

An eel inside the digestive tract of a dark sleeper fish before its escape attempt.

In mythology, giant oarfish are said to foreshadow earthquakes, although evidence shows this is not the case.

A pregnant porbeagle shark is believed to have been eaten by a great white, with the larger predator swallowing its tracking device off the coast of Bermuda, scientists report.

Beachgoers found a rare oarfish off California two days before an earthquake, mirroring folklore that says the deep-sea creatures are "doomsday fish."

This slimline, eel-like fish has no scales for protection so chooses to use a sea cucumber's sphincter for safety.

Scientists found three distinct great-white-shark populations that congregate in different oceans and do not interbreed. Their separation may have implications for conservation.

Two endangered female sharks found to be reproducing asexually in the absence of males in what appears to be a vital survival mechanism amid declining male populations.

Surprising new research has revealed why the world's longest-living vertebrate, the Greenland shark, has such a lengthy lifespan. The findings could have big implications for the species' future.

A decade after a huge mako shark dubbed "The Beast" was caught off the California coast, experts search for its enormous relatives.