I put a crayfish in for a treat for my big ray,He just ignored it.Now at feeding the crayfish will come down out of the driftwood and grab a bite of shrimp or worm.Today i saw him pinching the big rays nose?Keep in mind the crayfish has no front claws and just molted so he is very soft?I thought he would be a quick snack?Does anyone feed there rays crayfish?Do i have a wimpy ray?