Researchers have provided the first experimental evidence that a species of endangered sea star protects kelp forests along North America's Pacific Coast by preying on substantial numbers of ...

What you can see in this YouTube clip is very different from most of the underwater footage that you will come across online. It features a diver picking up sea urchins using a metal tool and breaking ...

A quiet yet powerful rescue mission is underway in the cold waters off the Pacific coast. The nonprofit Sunflower Star Laboratory is leading the charge to revive the critically endangered sunflower ...

Since early 2022, sea urchins have been mysteriously dying off across the Caribbean. Now scientists say they have identified the main culprit: a type of relatively large, single-celled marine ...

A drawing of the extinct Steller's sea cow Biodiversity Heritage Library via Wikimedia Commons under CC BY 2.0 For millions of years, gigantic sea cows weighing several tons swam in shallow waters ...