Theres been a few times at night while I was peeking in my tank with a flashlight that I've noticed what looks to be some sort of snail or slug on the LR. It doesnt really have a hard shell on it and almost looks like it could be a turbo snail without the shell. I just saw it today for the first time during daytime crawling around. Does anyone know what this is? Is it harmful? Should I remove it?