are rays immune to their own venom?...some snakes are so i asume it would be possible...i ask cause one of my rays has an exposed stinger and it is jagged after stinging the shipping bag and an oscar...i see my other ray bumping the stinger... i can't help but wonder if he were to catch it right and get stung could he die?...i will be getting 3 females in a week or so (if everthing goes acording to plan) to go with my 2 males...if they sting the bag also could the same sting insident occur with my existing rays when they check the ladies out?...also how long does it take to regenerate a stinger and how often do they shed...also are the sheds still venom coated? thanx ahead of time those are some thoughts i have been pondering as of late...