Lyncina leviathan is a species of tropical sea snail, a cowry, a marine gastropod mollusk in the family Cypraeidae, the cowries.

The dorsum surface of these elongated, smooth and shiny shells is pink-salmon, crossed by darker bands.

In the living cowries the mantle is brownish, almost transparent and well developed, with external antennae and several sensorial tree-shaped papillae.

Lyncina leviathan is common throughout the tropical Indian (East Africa, Red Sea) and the central Pacific Oceans, in the sea along Thailand, Australia, Polynesia and Hawaii.

They inhabit rocky intertidal areas and caves in very shallow water, but they can reach up to 40 metres (130 ft) of depth.