My mother in law purchase some hermits, snails, and some sort of plant that doesn't have any roots, and feels like a wad of fishing line, plus it's green. A while after we put it in the tank we saw some little things with antanae moving all around it, there were a whole bunch of them. The next day something with a bunch of legs submerged from the plant to eat a chunk of plankton that was the size of him. He ate it and you could see it inside of him, and a few hours later it appeared to be broken down. This little thing has over ten little tenecle things and that are attached to the base of the body that is about half an inch long. And the body part is semi transparent. Does anyone know what the little things are, or the thing with tenacles, or what type of plant it is?