SmilexGwG
Did u see it housed with anything else at the Store? As
Fallen_Leaves16
also noted, too me it looks like bite marks. IMO, possibly from another lung fish. In my earlier years of keeping i tried multiple lungs together. It did not work out lol⦠they locked lips and bit down to the bone on the head and it looked just like ur specimens nose. Looks like he lost for sure. The other bites look to be from a lung also. They have a mouth/jaw bone similiar to a snapping turtle. Lungs are tough as nails. I wouldnt do much honestly. Clean water and maybe take the fish out and apply betadine to the wounds to prevent infection.
If the fish is eating and acting normal id just keep feeding and doing water changes. Monitor to make sure the wounds arent getting worse or fuzzy looking. Clean water should heal him up in a month or so.
Lastly, did the fish come in like this or has it progressed since uve had it?