I just ordered 200 crabs from the shop nickcoletti recommended. The website is http://www.unboundground.com. I received them last week and I was very pleased. Only about 10 or so were dead. They night before they came, I had a good idea how to keep them until Felix and Oscar could eat them. I have a small outside water pond that is about 18" deep. I put a small fountain in the middle for water movement. I filled the pond about half full of salt water and poured the crabs in to the pond. I've put rocks in the bottom so they can climb up on the shelf which surrounds the pond so they can get out of the water. The sides are still about 10-12" high above the water line so they can't get out. So far I haven't had problems with birds or other animals getting the crabs. I guess the dogs in the back yard scare everything off. Just thought I would share my idea. I know it won't work during the winter, but it will work for a while.