Hi everyone. I’ve joined this site as I have a beautiful shubumkin named Sid. I won him at my local fair 3 years ago. He was about 2 ins long. He’s now grown to about 8/9 ins. He’s active and seems happy, though I’m contemplating getting a larger tank again to allow him more room for swimming. I’ve been worried just lately as this little white lump on his head that I noticed just before Xmas has now got much larger. Could it be a tumour? Most importantly could it be fatal. Any advice would be appreciated.