I found this red worm in my hatchery. I had peat moss that has been dried out for 9 months with some killifish eggs in it and I think an egg found it's way in there and piggybacked with the eggs. It closely resembles a bloodworm. Do they eat tiny fish eggs (1/16") or tiny fish (3/16")? I removed it as a precaution and placed it in my 5g nano. I wanted to make sure it wasn't eating the eggs because when I first saw the worm it was about 2cm and now it's about 3/4". Here are some pics and videos. I tried my best to get a good one with a cell phone camera...