Do the eggs hatch out of water where they are laid also??? havent got a spare hood to hatch in water.apple snails are not hermaphrodite, they are either male or female, males have a penis, if you have one snail, providing its very young you wont have any more snails, if its older and female it could have been mated with and as they store sperm until the season is right they could go on to lay fertilised eggs later on.