The unusual creature measures less than three millimetres in length, and is see-through with black-and-yellow spots. Find out ...

Passengers off the coast of California got the chance to spot mama sea creatures swimming in unison with their babies, boaters said. The day began with a pod of common dolphins being spotted along ...

An all white sea creature was seen leaping out of the water off the coast of California. Getty Images/iStockphoto A “beloved” white sea creature was spotted off the coast of California and boaters are ...

The UK's largest jellyfish was spotted off the Sussex coast.

There’s an emerging invasive species that, for now, has gone away with the warm weather. But they’re expected to pop up again next year. And they’ve been spotted in Pennsylvania before. USA Today ...