Camallanus Worms - That's a name I wish I never knew what means. I will track my battle with this pest in this thread. My fish experience is not that long; started my first tank in October. The first fish in were 6 male guppies. Out of them, one in particular was a bit bloated (my black & white tuxedo, there's a pic of him somwhere), and everyone else (including myself) thought it was constipation. I fed the whole gang peas, they all ate it including the "fatty" one. I never gave much thought to his larger belly, thinking it was just the way he was. He was eating and pooping and looked happy. Peas were added to the regular diet and they were always devoured. This morning I noticed he had an awkward postion (vertical at times, heads up) so I immediatly thought he must be constipated again. Took him out of the tank and put him in a 2g bowl with a live plant and tank water and some gravel.. I fed him some pea and he ate it. I was planning a day or so with no food till he gets back on track. I was constantly checking to see if he poops. After a few hours, he looked like he was trying to poop, but instead of the expected strain of (excuse me) poop, I see this red pointy thing. I was terrified. I immediately started to to a web search and learned about this horrible worm and that there seems to be a wide spread problem in my province and many local aquarists complained the local fish stores have worm problems ( I wish I kew this before). Apparently these worms might even by-pass quarantine since it can take up to 6-12 weeks before any symptom can be observed. After reading some more about the symptoms, I made a connection with some wierd behaviour I noticed in the other guppies. From the first week I had them, I noticed every now and then they would scratch their belly on leaves. I inittialy thought they might have ICH and I kept a close eye to see if they develop the well known white granulles. No trace of that so I concluded they don't have ICH and they must be playing with the leaves. They didn't. Apparently this is a symptom of Callamanus Worms, since as they move in their belly they give the fish some ich sensation. So I have to conclude all my fish are now either infected or at risk to get the worm. I am now reading and I've learn some good news that there have been success stories in treating this parasite, so I am being optimistic. I just hope Darth Vader pulls it through. I have to buy him a small filter and an air pump since I was not prepared for a hospital tank yet. I was waiting for the XMass sales to get all that. Looking now for the required medication in my area (Fenbendazole). Apparently that might be the biggest challenge, since it seems to be unavailable in Canada. Anyway, I will keep you posted. Fingers crossed for Vader.