Well, I wouldn't say it's an ordinary goldfish. It's shaped like an eel (which is how it's supposed to be), but I'm pretty sure it has fish TB. I need to treat it, we were thinking about just humanely euthanizing it, but I think we can cure it. I have a potential cure/treatment, but I have seen other odd symptoms from the fish. Like spewing blood from it's gills and breathing rapidly. All of my other fish are healthy and doing great, so that's why I have quarantined the sick fish. It has large tumors filled with fluid on both sides of it's stomach area and has a spinal deformity, which are both signs of fish TB. Goldfish are supposedly susceptible to fish TB. This disease can apparently affect the brain as well as the organs (like kidneys), so another sign is sort of just acting weird. For example, swimming backwards, swimming up to the top of the tank and then down again quickly, etc. The fish has a white pigmentation of the skin due to the white blood cells attempting to fend off the disease. The fish is still alive and I am trying to do as much as possible to help it. Any suggestions for treatment like salt baths or medications?