My Stingray has been eating 2 huge Earthworms every morning for the past few days. I got them at Wal-Mart in the fishing/Tackle section. They are labeled "20 Canadian Nightcrawlers" They are $3 for 20. I figured its an ok deal and bought 5 cups full. My stingray is looking like a fat little Buddah on these. anyone else feed them to their Ray?? Are there cheaper options out there (besides digging up your backyard ect..)