Family: Ovulidae. These shells come in either an egg or spindle shape and, much like their cousins the cowries, have no operculum (trap door). Most are less than one inch long and are commonly found in the Indo-Pacific region, on soft corals, sea fans, and sponges. They also have a colorful mantle, which covers the outside of the shell. Like the cowrie, they use the mantle for camouflage. Interesting Facts: The common name egg shell is derived from the white porcelain-like finish on these beautiful shells.