For more than 60 years, the ginkgo-toothed beaked whale (Mesoplodon ginkgodens) was one of the ocean’s greatest mysteries.

Scientists have finally photographed a whale known only from sounds and remains, linking a mysterious deep-sea signal to a ...

Deep below sunlight, a rarely seen frilled shark reveals ancient anatomy, slow reproduction, and mysterious habits, offering ...

Prehistoric sharks appeared hundreds of millions of years before dinosaurs and quickly became dominant marine predators. This ...

Giant phantom jelly sightings are extremely rare, but recent footage shows this extraordinary deep-sea jellyfish in all its ...

The Caribbean Sea is often associated with crystal-clear water, vibrant coral reefs, and post-card perfect beaches. But ...

Wondering about the world's weirdest sea creatures? We've compiled this list of the 20 weirdest animals in the ocean to show ...

Eerie yet fascinating footage shows the 10-metre-long sea creature gently pulsing and swirling its way through the dark ...

A study of the hearts of Greenland sharks has found that the long-lived deep-sea predator has massive accumulations of ageing ...

These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

Killing the protected animals may be the only way to stop them from eating too many of the Pacific Northwest’s endangered ...

Read how ancient Greenland sharks' bodies preserve their eyesight for hundreds of years and what this means for older humans.