welll to be honest.... im new at this, and i saw some sort of limb creeping out of a crevice in the live rock. I mean its a larger piece and i heard some stars can live in the rock and then grow too large to escape. I heard this from friend of mine, he suggested it could be a serpent star, but none of the pictures of any of the stars i have seen online have resemblembed anything like one. It was a shocker because i have had this piece of rock for 2 monthes now and have only seen this once. I think i might carefully knock a few pieces off to try to discover what this is... bad idea?? good idea??? or doesnt really matter either way?