Battle Wound Cause For Concern?

My new male is a little too forceful when it comes to breeding and I just noticed this white stuff on one of the bite marks that he left on my big girl. What is it? The rays won't let me get a good look at it so I am not sure if it is just roughed up flesh, sand particles stuck to a wound, or something worse. I have been super paranoid since my last losses so I figured I would ask here immediately in case it is something that needs nipped in the bud asap.
I appreciate any and all input, Tom.

Top of her disc on her left side. The male was dragging her sideways across my tank and she just let it happen. I stopped him but not soon enough. She has at least 6 inches on him so maybe it barely phased her. When he nips at her rear she sure don't like it though. I noticed earlier today that his clasper looked like it had been used so hopefully he'll stop with all the attitude.