I noticed that some of my Anubias were getting holes in the leaves, and today when I got home there was something on the leaf. It looked like either a pink worm or pink fish poop. It was definitely right next to new cuts in the leaf, and when we removed the plant from the aquarium, the pink thing was suddenly not there anymore--nor was it visible in the tank. There are lines cut across the Anubias leaves like something was chewing in a straight line. Can anyone tell me what this is, and what to do?