About Neverita duplicata (Say, 1822)
The shell of Neverita duplicata has a flattened globular shape, reaching a maximum dimension of around 88 to 90 millimetres (3.5 to 3.5 inches). Shell color is variable, but is most often greyish brown. In fresh shells, the central apex of the shell is often dark blue, which gives the shell a slight resemblance to an eye. On the underside of the shell, there is a large brown callus that partially blocks the shell's umbilicus. The maximum recorded shell length for this species is 82 mm. Neverita duplicata is a common species native to the western Atlantic Ocean. Its distribution extends from Massachusetts and other areas of New England, south through Florida and other Gulf of Mexico states, continuing further south to Honduras. This moon snail inhabits sandy shores just below the low tide line. Across most of its range, empty shells, along with opercula and sand collars, are very commonly washed up onto beaches. The minimum recorded depth for this species is 0 m, while the maximum recorded depth is 58 m.
