I was going through my tanks today inspecting for bad things on or around the corals I have. I found this serveral things under a coral base rock. The first picture I have is of a black meaty thing stuck to the rock. Then I found this brownish meaty criter with funny looking tenicles sticky from it. I had to pry both from the rock. Third I have a few of these worms...red or orange in color that have legs on the side and come out at night..I found them under coral bases and shells. The fourth thing I found dissappeared ..was almost transparent. It looked like a slug as it moved and had circular black rings on its body with a transparent body. Was about 1 inch long and 1/2 in wide and about 1/16 inch thick. Couldn't find it when I came back with my camera.