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 colours, and may be patterned also. They are marine gastropod molluscs in the family Olividae within the main clade Neogastropoda.

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.

The shell surface is extremely glossy because in life the mantle almost always covers the shell

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Agaronia gibbosa (Gibbous olive)
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Agaronia gibbosa (Gibbous olive)

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Agaronia johnkochi
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Agaronia johnkochi

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Agaronia lutaria
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Agaronia lutaria

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Agaronia nebulosa (Blotchy ancilla)
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Agaronia nebulosa (Blotchy ancilla)

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Felicioliva peruviana f. fulgurata (Striped peruvian olive)
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Felicioliva peruviana f. fulgurata (Striped peruvian olive)

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Oliva amethystina (Amethyst olive)
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Oliva amethystina (Amethyst olive)

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Oliva amethystina f. carnicolor (Blood-coloured olive)
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Oliva amethystina f. carnicolor (Blood-coloured olive)

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Oliva bulbosa f. fabagina
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Oliva bulbosa f. fabagina

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Oliva buelowi phuketensis 
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Oliva buelowi phuketensis 

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Oliva carneola (Carnelian olive)
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Oliva carneola (Carnelian olive)

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Oliva dactyliola
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Oliva dactyliola

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Oliva elegans (Elegant olive)
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Oliva elegans (Elegant olive)

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Oliva irisans kremerorum
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Oliva irisans kremerorum

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Oliva oliva oliva (Common olive)
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Oliva oliva oliva (Common olive)

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Oliva oliva f. oriola
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Oliva oliva f. oriola

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Oliva mantichora
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Oliva mantichora

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Oliva porphyria (Tent olive)
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Oliva porphyria (Tent olive)

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Oliva panniculata
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Oliva panniculata

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Oliva reticulata (Blood olive)
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Oliva reticulata (Blood olive)

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Oliva rubrolabiata (Red-lip olive)
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Oliva rubrolabiata (Red-lip olive)

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Oliva rufula (Chevron olive)
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Oliva rufula (Chevron olive)

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Oliva sericea (Orange-mouth olive)
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Oliva sericea (Orange-mouth olive)

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Oliva sidelia (Pretty olive)
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Oliva sidelia (Pretty olive)

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Oliva tigrina glandiformis (Black tiger olive)
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Oliva tigrina glandiformis (Black tiger olive)

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Oliva vidua (Moor olive)
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Oliva vidua (Moor olive)

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Miniaceoliva lamberti
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Miniaceoliva lamberti

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Miniaceoliva miniacea (Pacific olive)
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Miniaceoliva miniacea (Pacific olive)

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Miniaceoliva miniacea f. johnsoni
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Miniaceoliva miniacea f. johnsoni

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Miniaceoliva flammeacolor
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Miniaceoliva flammeacolor

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Vullietoliva splendidula (Splendid olive)
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Vullietoliva splendidula (Splendid olive)

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