High Quality Content by WIKIPEDIA articles! Xanthodaphne palauensis is a species of sea snail, a marine gastropod mollusk in the family Conidae. SNail is a common name for almost all members of the molluscan class Gastropoda that have coiled shells in the adult stage. WHen the word is used in a general sense, it includes sea snails, land snails and freshwater snails. OTherwise snail-like creatures that lack a shell (or have only a very small one) are called slugs. SNails often live up to 10 years. SOme species have lived for at least 25 years. ONe snail, the Giant African Snail, can grow 15 inches (39.3 cm.) from snout to tail, and weigh 2 lbs. SNails can be found in a wide range of environments including ditches, deserts, and the abyssal depths of the sea.