I recently added a mature male to my tank and in a couple days he just started going after my mature female, biting at her in what seems to be his attempt at mating with her. She tries to sting him each time and this will go on for 5 minutes or so then they stop and go about their business for a little while and then start back up again. She seems to want no part of it. He completely ignores the other rays and fish in the tank focusing solely on her. Is this typical of the beginning stages of mating? If so, how long will this typically go on before he is successful. It would be both parents first time so I would imagine there may be some learning curve. Is there anything I can do to get hey to be more willing? This would be my first time having rays mate so as you can image i am excited and any advice would be greatly appreciated.