Help with an ID please

[tsouth]

Hey everyone I'm having some pretty weird growths on one of my rocks that has now spread to form another colony on the other side of the tank. It's translucent/white and looks like an encrusting sponge that has the shape of mountains.

[LordMaximo]

Wow...wild little mountains. I use to take a sample to the University labs for definition of the growths. Most local universities have a marine biology dept. that are more then willing to study new growths. It makes for a good PR with the local proffesors and adds to your needs for study. Have you drop over to your LFS for some possible answers?

Nice crystal mountains, I would nip it as soon as possible, before it might kill off something more valuable in your tank.

Good luck,

Maximo

[Reefdiver72]

Is it hard or soft? I have had sponge grow behind my rockwork but not where there is much light. looks like some sort of algea from the pics I cant really tell.