I have a Betta that has slowly developed a bulge on its left side directly behind his gill. A couple of months ago is was almost undetectable, but it has now grown fairly large and easily seen. Anyone have any experience with something like this? He's become slow and lethargic as well. Tumor??
Yea I would diagnose that currently as a tumor. I heave heard on another thread someone got a syringe and took all the fluids out from it, worked, then for some it didn't.
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