EBA randomly clamps one fin?

[Stefan3289]

I just did my usual about 40/50% water change I do weekly and a few hours later, before I turned off the lights, I noticed my one EBA would swim with one of his fins clammed, then he would just go back to normal. Then back to clamped, and so on...I don’t know what would be the issues. Could he have hit it somewhere? It’s also only one side and this is very recent

 

[Lukman]

I think it's got fungus

 

[Stefan3289]

He doesn’t seem to have any other signs like white patches or such and all the other fish seem to be fine. Also just went downstairs and turned on the lights and he seems fine he is doing is normal swim at the top cause he gets excited either to see me or he thinks he will get food

 

[Katsplaty]

Hi, what happened? My platy is suddenly clamping its fins