Help with this one please

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Malemew

Aquarium Advice Newbie
Joined
May 29, 2012
Messages
8
Hi

I purchased a few extra bit of live rock a few weeks ago as I hear you can never have enough.

When I got the rock there was what I can only explain as the skeleton in the shape of a deep saucer or upside down mushroom head.

Since then blue stuff has started to fill the skeleton on one side and a bit of dark pink on the other. It's as if the skeletons skin is growing back :)

Would anyone know what this is?

Many thanks
 

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