Thanks for the response! Yes it's just on the one side. It definitely seems to be coming out from under the skin itself rather than a growth - it moves as the gill does.
Will the injury heal up naturally on its own, with good upkeeping of the water of course?
Here's a link to a video of it...
Hi guys, I created this account to get some advice.
For the last few weeks my betta has been subdued. I kept an eye on him and the tank as as he was still eating occasionally and the other tank mates (9 cardinal tetras) seemed fine. However today I found what seemed like part of his right gill...