Just read a story about a couple of scientist whom watched a hammerhead attack and use it's head to literaly "hammer" a ray into the bottom, then held it down with it's head and mucnhed the wings like eating the head off a choclate bunny. So I guess that sharks do eat rays. The same report told of a mature hammerhead that was seen to have no fewer than 97 stingray stings in it head. But still wouldn't use ray for bait. Might make good live bait but how would you hook it?