Shark's Eye, also known as Atlantic Moon Snail
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Naticidae, Genus: Neverita, Species: Neverita duplicata · Naticidae (Moon Snail family) · Gastropod (univalve) whole shell, globose or spherical shape
Species
Euspira lewisii or Neverita duplicata (likely Neverita duplicata)
Shell Type
Gastropod (univalve) whole shell, globose or spherical shape
Family
Naticidae (Moon Snail family)
Size
Approximately 1 inch in diameter, which is on the smaller side. Adult specimens typically range from 1.5 to 3 inches.
Color & Pattern
Soft peach to brownish-orange base color with a distinct, darker reddish-brown spiral apex (the 'eye'). The colors appear natural and slightly weathered from surf action.
Rarity
Common, frequently found washed up on sandy beaches along the Atlantic and Gulf coasts.
Habitat
Found in shallow marine waters, primarily intertidal and subtidal zones, burrowing beneath sandy substrates and mudflats.
Geographic Range
Western Atlantic Ocean, ranging from Massachusetts down to the Gulf of Mexico, Florida, and the Caribbean.
Description
A smooth, highly polished, globose shell with a low spire and a prominent, dark reddish-brown nucleus that resembles an open eye. The surface is glossy and porcelain-like, lacking heavy sculpture or ribs.
Key Features
Globose, round shape, low-profile spire, glossy texture, and the distinctive dark-colored central apex resembling a shark's eye.
Collector Value
Low to moderate commercial value, but highly popular among casual beachcombers and beginner shell collectors due to their pleasing, tactile shape and distinct appearance.
Condition Notes
Good condition with minor natural wear along the outer margins. The polish is well-maintained by wave action, and the central eye feature is clear and vibrant. Grade: Good to Fine.
Interesting Facts
Moon snails are carnivorous predators that drill smooth, countersunk holes into the shells of other bivalves using a specialized radula and acidic secretions to consume the prey inside.
Ecological Role
Acts as a primary carnivorous predator in benthic marine ecosystems, helping to regulate bivalve populations and maintain benthic community balance.
Similar Species
Neverita heros (Northern Moon Snail), which tends to be larger and grayer, and Polinices species, which have different callus structures covering the umbilicus.
Beach Finding Tips
Look along sandy beaches at low tide, especially after a storm. Scan the surf line where smooth shells roll easily in the wet sand.