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.
Image: Oliva kaleontina
Image: Lettered olive 0015
Lettered olive, Oliva sayana
Neogastropoda is an order of sea snails, both freshwater and marine gastropod molluscs.
Neogastropoda
Two neogastropods in the picture. Brunneifusus ternatanus (left) Murex trapa (right) in captivity.