GUARDAMAR DEL SEGURA, Spain – Recent sightings of a tiny blue sea slug with a powerful sting have closed beaches in southeastern Spain. Blue Dragon sea slugs are around an inch long and have unique ...

The blue dragons, which pack a ferocious sting, have led to several beach closures. Experts say it’s a worrying sign of the warming of the Mediterranean. By Jonathan Wolfe When a pair of ...

The blue dragon may be too weak to resist the ocean's current, but it can take on a Portuguese man o'war and even steal its venom. When you purchase through links on our site, we may earn an affiliate ...

A marine conservationist has revealed the secrets of one of the ocean's most beautiful but dangerous creatures. The mysterious blue sea dragon is a species of small sea slug that uses venom taken from ...

Sabrina Imbler is the author of the forthcoming book “How Far the Light Reaches: A Life in Ten Sea Creatures.” A remotely operated vehicle filmed a life-form this summer on the seafloor that was ...

Hordes of bright blue, jellyfish-like sea creatures are washing up on beaches across California. As of Monday, thousands of the critters — called velella velella or by-the-wind sailors — have been ...

Researchers are puzzled by mysterious blobs that they can't identify. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Unidentified deep-sea "blue ...