Ok here are my thoughts.
The female is biting the tips or tentacles off of the anemone and biting the other clownfish.
I think maybe she is defending the territory, that is the anemone, and the biting is going to heal if they are small and she backs off for a while, but may also lead to an infection in the anemone if this behavior keeps up and possibly killing it. Why she is biting her own territory is beyond me, but once you have something to defend your aggression levels go up. She is also biting the male clownfish and causing him damage, if this keeps up your going to have the same situation. Dead clownfish or at least an infection and possible disease if this keeps up as well. If he gets too damaged, then sooner or later the cleanup crew is going to start looking at him as if he were a meal, or soon to be meal.
I would get rid of that over aggressive female clownfish and send her packing back to the LFS.