Surfer on Mola mola sighting: “Lots of people thought the flopping dorsal fin was a shark." ...

Deep sea holds alien-like species. The frilled shark, a living fossil, remains a mystery. Its unique anatomy includes six ...

The vast array of organisms in the deep sea remains a mystery to humans. Now, marine biologists can add one more puzzle to the list. A collection of odd materials was discovered nearly four miles ...

Ted Judah went diving off McAbee Beach in Monterey Bay when he caught sight of a 'silvery knife blade undulating thing,' ...

Seeing even one of these sea creatures is rare.

A towering, centuries old sea creature has been found rising from the seafloor off New Zealand, its branches forming a living ...

Sea creatures have adapted to help them thrive in extreme environments. Unusual features allow them to live thousands of feet below the surface. Underwater robots give researchers a glimpse at some of ...

A sea creature washed up on the Maine shore. Getty Images/iStockphoto A giant sea creature that washed up on the Maine shore has fascinated beachgoers, but city officials have a strict warning for if ...