My clown loaches have been nudging and [half-heartedly] fighting my oscar. They rub the sides of their faces against the side of the O. I know the CLs have those spikes under their eyes/on their cheeks; can they use them offensively? Can they shank other fish with them? Was I witnessing an aquatic jailhouse uprising? Or are the cheek spikes only for defense. It def seemed like the CLs were instigating contact, not the O. No obvious wounds on the O, but he is hiding more than usual (but is still pretty outgoing). What gives?