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 ...

The sunflower sea star (Pycnopodia helianthoides) can be found throughout intertidal and subtidal coastal waters of the northeast Pacific Ocean, from Alaska to at least northern Baja California, ...

They are members of the phylum Echinodermata, which first appeared during the Cambrian explosion. Their list of close relatives includes starfish, sand dollars (themselves irregular, flattened sea ...