What's this white lump on my Betta fish's tail and how to treat?

Question

I have a Betta Fish that has a large white lump near his tail I'm not sure if it is swim bladder, tumor, or a fungus. Pet's info: Fish | Unknown - Fish | Male

Angel Alvarado, LVT · Accepted Answer

It is likely not his swim bladder since that is an internal organ. Fungal infections appears as fuzzy growths on fins and scales. A tumor would appear much more solid than a fungal infection. Fungal infections can be treated using an antifungal medication which can be purchased online or in the aquarium section of most pet stores. A tumor could be removed, but you would need to have a veterinarian experienced in treating fish examined it first. Check the water quality and make adjustments as needed. Confirm proper temperature (78-80F). Monitor the lump for rapid change or growth.

What's this white lump on my Betta fish's tail and how to treat?

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