Hi guys have a question about my betta. Hes had a mark on his side since the day I got him which I just thought added to his character. I actually bought it for the uniqueness. A few days ago a white lump has started protruding through the scales where his mark is. Hes not unwell at all, still very active, full colour, flares up when he sees me, still eats like a pig as you can see hes bloated from his last meal (which was about 2 mins before I took the pic). Im assuming its a tumor of some sort. Has anyone seen anything like this before? Is it treatable, or am I going to need to brace for the worst. Attached are two pics. One of his mark taken about 12 months ago. And another taken just now.