I noticed a large lump on a rasbora I just purchased. It is on his back, towards the front. It is the same color as the rest of him, but has whitish patches in it. It does not seem to affect him at all, he seems normal. I read everything on fish diseases and figure it just must be a cyst or a tumor. It is in no way an open sore, just kind of unsightly. He is already in my main tank, so I figure I will just leave him and see what happens. Any other suggestions on what it may be?
