thrujenseyes
Fish Herder
I wish I could offer some advice but I've never kept a beta (well not since I was a kid...and that was in a bowl). It does appear to be a tumor and from all the posts I've read on this board in the last year or so it does seem that betas are kind of prone to this sort of thing. I've seen a number of people looking for help with similar issues. I'd search around this site and maybe just google in general "beta with tumor" and see what kind of information you read.
Sorry he's not well, but I'm glad you're trying your best to help him.
Good Luck.
Sorry he's not well, but I'm glad you're trying your best to help him.
Good Luck.