Thanks for the compliments guys. I'm not sure what the specific type the green SPS is. Maybe someone can chime in. Also, I believe the crab is some type of porcelain crab. He was in there when I get the coral and never leaves it. He doesn't seem to be hurting anything. The small brown SPS with two branches is going to be cool I think. When I bought it, it was totally brown and now it seems to be turning more purple/green every day.