I have to say, it looks very similar to a green variety of Caribbean anemone ( Condylactus gigantea ). This anemone comes from many parts of the Caribbean but is commonly called a Haitian Pink Tip anemone. Don't let the name fool you tho, it comes in a variety of colors besides white with pink tips ( like the Florida anemone Condylactus passiflora). The foot can be any color from no color at all to light red, dark red or an orange(ish) color. While the HPT is not usually a good anemone for clownfish hosting, I've seen many wild clowns that usually use a bubble or ritteri anemone use these as well.