The multi-rayed sea cucumber measured about 1 foot long and 3 inches wide when alive but shrank after being preserved, researchers said. It had a “long,” “dark violet” body with 17 ...

In the deepest depths of Earth’s ocean, mysterious creatures lurk that could come straight out of a sci-fi movie! Watch this ...

Swimming through the shadowy waters off Palau, scuba divers watched life on a coral reef after dark. One reddish sea creature ...

Boaters got “lucky enough” to spot a plethora of sea creatures off the coast of California, spotting multiple species in one ...

To survive the deep ocean, sea creatures need all kinds of adaptations that give them alien-like appearances, like huge eyes and needle-like teeth.

An unusual sea creature washed up on a Miami beach, leaving a family completely transfixed by its beauty - but it has a dark side. The family were relaxing in the spring sun, when they noticed ...

When scientists spotted a strange, hooded creature in the ocean's depths 24 years ago, they had no idea what to call it. Though the animal looked a bit like a jellyfish, it wasn't one, and while ...

This previously unknown symbiotic relationship helps keep methane—a major greenhouse gas—trapped in the ocean.

Deep in the ocean's dark depths lurk bizarre and terrifying creatures evolved over centuries. Anglerfish use glowing lures to attract prey, while goblin sharks possess extendable jaws and ...

Meet the 'sea moth,' a three-eyed sea creature from 500 million years ago The Mosura fentoni, or "sea moth," may have used its third, median eye to detect light and move around its environment.