Metallic Green Sea Anemone (Anthopleura xanthogrammica), or what is known as 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 and giant tidepool anemone. Giant Green Anemones are found along the shoals of the Pacific Coast line and require cold water to survive unlike the warm tropical aquariums held by marine enthusiasts.
These anemones are very rarely available for purchase through retailers and are also banned from being collected in many areas. If they do become available for purchase somehow, they should only be kept by more experienced hobbyists.
They live in mid-to-low intertidal zones where there is strong wave action and surge. It gets some of its green color through natural pigmentation, much of its color is gained from the symbiotic relationship it has with the microalgae (zoochlorellae) and dinoflagellates (zooxanthellae) that live in its tissues. These unicellular organisms are photosynthetic, providing the giant green anemone with beneficial nutrients as well as pigmentation.
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