Giant Green Anemone
Anthopleura xanthogrammica

A close-up detail of the tip of a tentacle
shows the wonderful coloration
of the Giant Green Anemone.

The brilliant green color of these animals
comes from the symbiotic zooxanthellae
that live in cells within the anemone's body.
The zooxanthellae photosynthesize, producing
food for both themselves and the anemone.

Because photosynthesis requires sunlight,
these anemone are usually found in shallower depths
from Alaska to central Baja California.