Muricidae is a highly diverse family of marine snails in the clade Neogastropoda, containing more than extant species. (Image courtesy of Chong Chen, Department of Zoology, Merton College, University of Oxford. Do not reproduce without permission.
'Mother of Pearl' shell illustrates the Fibonacci sequence, a mathematical sequence discovered in the century. A pattern appears in nature over and over again to the curve of a wave, the spiral of a sea-shell, segments of a pineapple.