I just received an order of rock from Gulf live rock. There is some kind of finger-shaped sponge I am guessing that is attached to one of the rocks. It is reddish orange even though the picture kind of looks pink. Is it a sponge or???
My tank has had some cured Rock in it for a few weeks and a few snails and crabs but nothing else and if this is a sponge and from what I understand they are difficult to keep should I remove it so it foamy contaminate my tank or what?

My tank has had some cured Rock in it for a few weeks and a few snails and crabs but nothing else and if this is a sponge and from what I understand they are difficult to keep should I remove it so it foamy contaminate my tank or what?
