Dive site Grouper Grotto, max depth 17.1 m / 56 ft.
San Diego County, California, US
Anthopleura sola, commonly known as the starburst anemone or giant green anemone, is a species of sea anemone of the family Actiniidae. A. sola was previously considered the solitary form of the common aggregating anemone Anthopleura elegantissima, but was identified as a separate species in 2000.
Saw quite a few of these guys.
Not sure if this is a green sunburst because it wasn't quite that green.
Sea anemones are a group of water-dwelling, predatory animals of the order Actiniaria. They are named for the anemone, a terrestrial flower. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. Anthozoa often have large polyps that allow for digestion of larger prey and also lack a medusa stage. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and Hydra.