Too small to get a pic but can describe it perfectly. Flat, square and green with a small red dot and a tubular appendage just in front of the dot. They move slowly like a slug. My tank inhabitants don't seem to eat them. Snails, cleaner shrimp, Clown and clown goby. They're everywhere. Any ideas on what site I should be looking to help ID these things. They don't seem to be hurting anything other then my eyes