Aggregated Green Anemone

Also called clustering anemone, pink-tipped green anemone, surf anemone.

Look for pale green tentacles with pinkish or purple tips. If growing alone, they can become quite large in size (up to 10 inches across) Most of the time you will find them in colonies of much smaller individuals covering large areas of sand or rocks.

They attach to rocks at or below the surface, but sand seems to be important for them to colonize.  If you look closely, you may see one of the anemones splitting in half, making two identical anemones where there was once just one.