Lewis's moon snail

''Neverita lewisii'' , common name Lewis's moon snail, is a species of large operculated sea snail. It is a predatory marine gastropod in the family Naticidae, the moon snails. Traditionally, this species was assigned to either the genus ''Lunatia'', the genus ''Polinices'' or the genus ''Euspira''. Recently, it was assigned to the genus ''Neverita'' based on molecular data.

This is the largest species in the family.