I bumped up his feeding to every day and it was doing good until I missed feeding him one day then that morning me and my daughter went down to feed and the stingray started to get excited for the food and the shark came out and again attacked the stingray taking a huge chunk out of the tale. A few day later the stingray perished. Now I would like to get another stingray but I am worried. What's weird is all of the other smaller fish are fine with him.