Red severum white areas of tissue damage

[KG23]

Hello all. My red severum (full adult - about 8-10 inches) is very sluggish, sitting on the bottom and gasping. It has these white areas behind the eye. Other fishes seem ok. It is a blood parrot/severum tank. I think this fish is probably gone, but I would liek to know what this is. Is it a fungal or parasitic infection of some sort? I have performed a full water change.
Thank you!

 

[kno4te]

I’d suspect bacterial. Would try some kanamycin and furan2. Salt 1 tsp per g if ur able to.

 

[Gourami Swami]

At first glance, looks to me like injuries, could another fish have possibly beat this one up? Bacterial infections are common after a fish gets into a fight, especially if the tank is not maintained as well as it should be. How often do you do your water changes/what size tank and how many fish? Have you noticed any other fish picking on this one?