Olividae

Olive Snail
Shells of Lettered olive, Oliva sayana
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Neogastropoda
Superfamily:	Olivoidea
Family:	Olividae Latreille, 1825
Genera
See text
Synonyms
Olivancillariidae

See text

Olivancillariidae

Olive snails, also known as olive shells and olives, scientific name Olividae, are a taxonomic family of medium to large predatory sea snails with smooth, shiny, elongated oval-shaped shells.

The shells often show various muted but attractive colors, and may be patterned also. They are marine gastropod molluscs in the family Olividae within the main clade Neogastropoda.

Also see the Olivellidae, the dwarf olives, which were previously grouped within this family, but which now have their own family.

According to the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) the family Olividae consists of three subfamilies:

Olive snails are found worldwide, in subtropical and tropical seas and oceans.

These snails are found on sandy substrates intertidally and subtidally.

The olive snails are all carnivorous sand-burrowers. They feed mostly on bivalves and carrion and are known as some of the fastest burrowers among snails. They secrete a mucus similar to that of the Muricidae, from which a purple dye can be made.

Physically the shells are oval and cylindrical in shape. They have a well-developed stepped spire. Olive shells have a siphonal notch at the posterior end of the long narrow aperture. The siphon of the living animal protrudes from the siphon notch.

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Wikipedia