I snapped a picture before it slid into a hole. Moves like a snail. Looks like roundish body with a flat tail and antenna, a couple of longer ones and shorter ones all around. Thought they could be legs. Could not tell any color because actinic lights were on. When I first saw it, it appeared to be feeding on maybe some algae on the rock. Looked up critters and did not see a match. Did not see any others anywhere else in tank. Wish the picture was better. Next time I will try to hit the white lights and take a picture of it. Is it a friend or foe? Any help would be appreciated. Thanks


