Yellowish Large Growth on Betta?

Hi All,

I post this for a friend, who has had her betta fish for about 2 years, and recently it has an enlarged yellowish stomach region. She doesn't believe the issue is overfeeding, although it is possible that her brother has been feeding her betta without her knowledge.

What are some possible causes of this swelling / yellowish growth? How can she treat it? It is still swimming fine and making a bubble nest, so she doesn't believe it is in discomfort, but she would certainly like to treat it.

Thanks in advance for all your wisdom. Pictures to follow.

Thanks all, i sent her that information and she thinks it is indeed bloat, probably from a diet including too many of the freeze dried bloodworms. Shes going to try a pea.


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