Can anyone tell me if this is possible? He's had a fungus since October but is gaining back all his color again, eating very well, is very spunky and building daily bubble nests. I moved him into a heated 5 gallon tank and he's been on a fungus med. While doing a water change, to our horror, a 1/2 inch long wiggly brown thing came out of the water, with 6 legs and a knob type head. It's so gross!!! It swims and is very alive! Is this some sort of parasite? Tried to find pics on web but no luck. FYI we moved a decoration from my 20 gallon tank into his 5 gallon last week, but did clean thoroughly before adding to his tank. 