As adult, Egg Cowries are not the most exciting of critters. Most divers would swim over one, as the do not ever seem to move, and are completely covered by their black mantles. They sit on leathery soft coral, which they eat.
The juveniles, however, are very beautiful, and very occasionally we catch one moving. These lovely molluscs have big bulbous papillae sticking out, coloured yellow and white.
Egg Cowries get their name from their shells. You never really get to see much of the shells, but underneath the black mantle is a large and completely white shell which resembles a boiled egg….