What is it and should I care much?

[Lars]

Here is a picture of something that has started growing in my tank over the last couple of months. It grows rather slowly, has an opaque appearance and a rubbery feel to it and it peels off the rock easily. Should I dispose of it or is it benificial in any way. If it is benign I think I will get rid of it as it is not very appealing to the eye, but if it is benificial in any way, well maybe I'll think about it. Thanks.

 

[SnowManSnow]

to venture an uneducated guess Id say sponge. and not damaging to anything in your tank.

b

 

[Anonymous]

Looks like a spnoge to me also. Nothing to be concerned about.

 

[Anonymous]

Bad pics. If it doesn't move than it is a sponge. If they move I say flatworms.