Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Vokesimurex lividus is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.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.