Fused shells of the giant acorn barnacle (Megabalanus tintinnabulum). Family: Balanidae
A Schilder's Tiger cowrie sea shell (Cyprae tigris f, shilderiana). These are large sea snails, marine gastropod molluscs in the family Cypraeidae. The beautiful porcelain-like shells are often used in jewelry.
A Tiger Nautilus shell and the symmetry of its reflection. The nautilus is a very ancient marine cephalopod of the family Nautilidae.
