Green Anemone This plant-like organism is really an animal, although it does have plants (algae) living inside of it. The green color of this animal comes from a symbiotic algae, called zooxanthellae, living inside its gut. The algae are capable of photosynthesis and provide the anemone with most of its nutritional requirements. The anemone, in turn, supplies the algae with food from its waste products. If the algae die, the anemone will gradually lose its green hue (and starve to death).