Anthopleura xanthogrammica, or the Giant Green Anemone, is a species of intertidal sea anemone of the family Actiniidae. Other common names for this anemone include Green Surf Anemone, Giant Green Sea anemone, Green Anemone, Giant Tidepool Anemone, Solitary Anemone, and Rough Anemone. This picture taken at the Seattle Aquarium
intertidal waters, Alaska to Panama
From the "Beaches and Shores" exhibit at the Seattle Aquarium.