What is this? It looks like some sort of cocoon. It seems to move slightly, too. It's about an inch long and looks slightly like the skin of a kiwi. Is it bad for my tank? Thanks.
It does look to be the same shape as a cucumber, but I've never seen any cucumbers like this one. It also pretty much stays in one place, just kind of moves its body. I'm really lost as to what it is / what to do with it.
