Shark Eye Moon Snail (also known as Northern Moon Snail or Atlantic Moon Snail)
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Naticidae, Genus: Neverita, Species: Neverita duplicata · Naticidae (Moon Snail family) · Gastropod (univalve), whole shell, globular and spiral shape
Species
Euspira lewisii or Neverita duplicata (likely a juvenile or closely related Naticidae species)
Shell Type
Gastropod (univalve), whole shell, globular and spiral shape
Family
Naticidae (Moon Snail family)
Size
Approximately 0.5 inches in diameter, which indicates a small juvenile specimen. Adults of this family typically range from 1 to 3 inches.
Color & Pattern
Uniform glossy, porcelain-white exterior with a smooth, polished finish. The color is completely natural and unblemished, showcasing a pristine surface without banding or spots.
Rarity
Very Common, frequently washed up on sandy beaches worldwide.
Habitat
Found primarily in shallow subtidal and intertidal zones, buried beneath sandy or muddy substrates where they hunt for bivalve prey.
Geographic Range
Widespread in temperate to tropical marine waters globally, with specific related species common along the Atlantic and Gulf coasts of North America.
Description
A charming, miniature globular shell with a low spired apex and a smoothly rounded body whorl. The surface is exceptionally smooth and polished to a glossy sheen, lacking any heavy sculpture or ridges. The aperture is large and half-moon shaped, typical of the moon snail family.
Key Features
Globular, rounded shape, very smooth and polished glossy surface, low spire, and a characteristic semicircular aperture.
Collector Value
Low to moderate individual collector value due to abundance, though pristine, perfectly glossy juvenile specimens are popular for crafts and beginner shell collections. Typically valued at less than a dollar individually.
Condition Notes
Gem condition. The shell is fully intact, completely unblemished, retains its natural glossy finish, and shows no signs of sun bleaching, wear, or predator drill holes.
Interesting Facts
Moon snails are infamous predators that drill clean, countersunk holes into the shells of other mollusks using a specialized radula and acidic secretions to extract their prey.
Ecological Role
Moon snails act as key apex predators in soft-sediment marine benthic communities, controlling bivalve populations and providing discarded shells as vital habitats for hermit crabs.
Similar Species
Other members of the Naticidae family such as Neverita duplicata (Shark Eye) or Euspira heros (Northern Moon Snail), distinguished mainly by geographic locality, size, and subtle differences in the umbilicus area.
Beach Finding Tips
Look along sandy shorelines during low tide, particularly near the surf line or in wrack lines where light shells are washed ashore. Sifting through fine sand or checking tide pools can yield great finds.