One thing I can tell you is that a snail's bottom is right over its head.
It has been reported that at least one snail lived as many as 14 years in captivity. His name was George and he lived in Hawaii, in the United States.
There's a terrifying species that spreads rapidly, breeds prolifically and eats hundreds of plants. But the first research into the actual harm caused by giant African land snails found ... not much.