I am almost through with cycling my 55 gal fw aquarium and have 3 goldfish in it right now. When I went to feed them a little while ago I noticed small wiggly black worms on the glass cover of the tank and on the sides above the water level. From what I could find online they don't look like anchor worms and I don't see any attached to the fish. The fish don't seem to be affected from what I can tell. Does anyone have any idea what these worms might be and how to get rid of them?