We already have some fresh water crayfish in our dry creek, they only come out of their burls when it rains. The previous land owner said that all the ponds he made on the land kept blowing out, so the crayfish never had the opportunity to get large enough to even be considered for food. These are bottom feeders, so we will not be eating them, nor sailing them for food. These are only going to be used for their cleaning and filtering abilities to keep our ponds clean once we get them to hold water again. They will however make good food for our ducks, geese and maybe even the fish.