Please Tell me What This Grey/Black Waxy Looking thing is....?

[krispyk577]

also, is it bad?

I have seen it in the cave of a rock for a LONG time, but it just kind of took off and began to grow outside of it. What is this?

 

[bjohanson1234]

looks to me that it is a type of sponge. Had to tell from the pic, could you try and get a better one?

If it is a sponge, they are perfectly safe.

 

[Bifferwine]

I think it's a sponge.

 

[krispyk577]

try this one. should be more HD

 

[Bifferwine]

Sponge.