Has any anyody ever seen this before?

I've seen a tumor on Betas before, when I was reading I was going to say bladder infection. Then I saw the pictures, I am almost completely positive that is a tumor. I can't say what you should do, but of you have a local fish store, or veterinarian's can help you locate a sort of fish doctor/expart. So I'd suggest visiting locals and asking them for help (:

i've never come across something like that before but if she is acting and looking okay then thats the main thing. what i would do is take it to a fish shop and ask some of the assistants in there - they may be able to help and they might give you some medication for her to help the swelling go down but im not too sure, so the best thing is to just go and ask and then go from there.

hope that helps :-)

btw the first time i saw it i thought is was a little hat :-) poor thing!

It looks like some kind of Growth could be a tumor the problem with fish when they get things like this .Is there are not fish vets as such .Some have removed tumors from there fish .

When i'm reading your story, one thing that gets inside my head is a bladder problem. But when i saw the pictures, i can say that its a tumor... i suggest you visit a veterinarian urgent, maybe they know someone who can help you with your wish...

Go to an animal doctor...It's really weird.