I think that my goldfish has a parasite, but I don't know which. Sorry, I'm not very knowledgeable about fish. Photos not uploading 
. The goldfish in question has an ulcer on one side, and that side is bloated. It looks as if there is something underneath the scales on part of that side, making a section of it swell up a lot. I do not know what to do, please help!
. The goldfish in question has an ulcer on one side, and that side is bloated. It looks as if there is something underneath the scales on part of that side, making a section of it swell up a lot. I do not know what to do, please help!
