Fin rot, fungus or nips?

[meese-a-mew]

One of my discus got has this like white part on its dorsal and I'm not sure what it is as I've had aggression in the tank between a couple of them and it doesn't really look like fin rot to me. It doesn't really have like that fluffiness I usually see with fungus either. It's only on that part.
0ppm ammonia, nitrites
What do y'all think?


Meese

 

[meese-a-mew]

Forgot pic lol. will try and get better one tomorrow


Meese

 

[MissGurnus]

It doesnt look like fin rot or fungus to me either. However i don't know what it could be... Is he acting normal?

 

[meese-a-mew]

Yep eating, swimming, no scratching on rocks or doing that weird twitchy thing on the sand and rocks. I'm so confused lol


Meese

 

[Delapool]

It kind of looked like damage on the fin rays to me through "wear and tear". Would that be possible.

 

[meese-a-mew]

Yah it's a lot better now. Just a bit of it left


Meese