rdp50734
hates poor electrics :-(
Doesn't look so much as a fight wound more like where it has tried to get under a rock or something! It seems to large of an area to be fighting, the pic of the head last one. The first could be fight related, have you seen any of the fighting? How do they seem to react to each other when your watching them?
Im sure I will have the next set of questions before long 
The others are all fine though and I see them quite often. Its personal taste really.

Glad yours are all healed, I have 2 that have been havin a go! one has a few scales missing, the other a chunk of dorsal fin!
Why cant they just play nice!