Vasum crosseanumVasum crosseanum, common name ceramic vase or heavy whelk, is a species of medium to large sea snail, a marine gastropod mollusk in the family Turbinellidae.DescriptionVasum crosseanum has a large, thick and heavy pyriform shell that reaches a length of 95 mm and a maximum width of 65 mm.. The shell contains eight whorls with a spiral sculpture of uneven, rough threads. There are five columellar plicae.DistributionThis rare species occurs off Mauritius.HabitatThis sea snail lives on lower eulittoral, rocky areas at depth of 10 to 40 m.