I have had my current goldfish for a few years now, They have always been perfectly healthy, except one of them has a large growth on the side of it, it has been growing for about two years now, and it really is huge. It is the normal colour of the fish and doesn't seem to affect my goldfish in any way other than it must be a big discomfort. I really don't know what to do about her, and my other goldfish who is quite a lot bigger has nothing like this atall. Has anybody experienced this before and what will happen to her? I have also noticed that veins are appearing on the lump now, and a few months ago a large chunk of the lump fell off, which has now grown back again.
Any info would be much appreciated,