This is on a rock I recently bought. It's about the size of a quarter. Bright, dark pink almost red. I need to know what it is and what it needs. I think it's grown since I got it, but it's hard to tell for sure.
I guess it could be a sponge. I don't know too much about them. I bought this rock out of the LFS' coral tank. Here's another angle. It's a little blurry(it was a tough angle).
