i dont know the name, but it's some kind of green tabling acro. about 8-10" wide & 3" high. very fast growing. great looking piece to put on the edge or cliff of your reefscape. fast grower under direct lighting.
note: i would have to cut if off my base rock if you were to buy this. it's the green colony behind the red planet. i'm available after 5:30 M-F, all day weekend.