ID - a little sticky-icky

[vanreefer]

second vote for bubble gum

"It's a pink, spongy, sticky substance"
Maybe it's a sponge?

[krish]

If sponge coral is actually like bubble gum then I guess that's what it is. When I pulled the rocks apart it was just like picking up a shoe that's been in warm sticky bubble gum.

I couldn't find much about them on the net except for one site that said they compete with other corals for space. Could it inhibit my xenia from spreading?

[Der_Iron_Chef]

Unlikely. Xenia spreads like a mofo. :-)