This has been hiding out underneath the rock my dad's mushroom corals are on. We're not sure what it is though to me it kind of looks like a brittle star of some sort but I'm not sure if it's good to have in the tank or if we should remove it.
All we ever see of it are those legs, well usually three of them are out but when I took this picture only those two were out.
All we ever see of it are those legs, well usually three of them are out but when I took this picture only those two were out.