Birgitte Wilms / Cowry (Aclyvolva sp) camouflaged on Soft Coral (Ctenocella sp), Papua New Guinea

Juergen Freund / Allied cowry (Aclyvolva lamyi) camouflaged on red whip coral, New Ireland, Papua New Guinea

David Fleetham / Allied partner cowry (Aclyvolva lanceolata) on whip coral, Philippines. The mantel of the cowry imitates the polyps of the coral when they are open and feeding.