The Jewel Anemone (Corynactis viridis) is a marine (saltwater) anthozoan cnidarian in the Corallimorphidae family of sea anemones. It is an animal, not a plant. 

The Jewel Anemone is cylindrical, slightly wider at the base, with an oral (mouth) disc and polyps. The individual polyps are clustered in aggregations. It is not attached to the soil or rock – the individuals can detach and drift away. Its tentacles are short, althought the outer tentacles are longer than the inner tentacles. Its colour is variable, but it is mainly white, pink, orange, red, and green.