Karvis,
My Daughter-in-law, who also posts here sometimes, has a mated pair of Maroon clowns, and the female is huge!! about a good 6+ " and beats the stuffing out of the male..unless she wants to mate...the they do the "shake my shimmy" dance with each other..The one nipping the other is probably the female...and this is "normal" for clowns..
Just try to watch she doesnt rip fins, or skin...
Gl
~Susie