Shark Eye Moon Snail (Alternate: Northern Moon Snail, Atlantic Moon Snail)
Phylum Mollusca, Class Gastropoda, Order Littorinimorpha, Family Naticidae, Genus Neverita, Species Neverita duplicata · Naticidae (Moon Snail family) · Gastropod (univalve), whole shell with a globose, spiral shape
Species
Euspira lewisii or Neverita duplicata (Likely Neverita duplicata based on compact form and color)
Shell Type
Gastropod (univalve), whole shell with a globose, spiral shape
Family
Naticidae (Moon Snail family)
Size
Approximately 0.75 to 1 inch in diameter, which is small to medium for this species. Adults typically range from 1 to 3 inches.
Color & Pattern
Smooth, glossy finish featuring a soft warm brownish-tan or beige coloration with a slightly darker brownish or purplish umbilicus area. The color appears natural and sun-kissed, lacking strong banding but showing subtle growth lines.
Rarity
Very Common, frequently washed up on sandy beaches along the Atlantic and Gulf coasts.
Habitat
Found primarily in shallow subtidal and intertidal zones, buried beneath sandy bottoms where they hunt for bivalve prey. Marine environment.
Geographic Range
Western Atlantic Ocean, extending from Massachusetts down through the Gulf of Mexico and into South America.
Description
A charming, smooth, globular gastropod shell with a low spire and a polished, porcelain-like texture. The body whorl makes up the vast majority of the shell volume, wrapping around to a partially obscured umbilicus at the base.
Key Features
Globose, button-like shape with a very low spire, smooth glossy exterior surface, and a characteristic circular aperture with a thickened inner callus near the umbilicus.
Collector Value
Low to moderate commercial value due to high abundance, but heavily collected by casual beachcombers and crafters. Specimens with intact calluses and rich colors are preferred.
Condition Notes
Good overall condition with minor wear around the apex and aperture rim, typical of a beach-worn specimen. Surface retains a decent natural shine with no major structural fractures. Collectibility grade: Good.
Interesting Facts
Moon snails are famous predators that drill neat, countersunk holes into the shells of bivalves using their radula and acidic secretions to feed on the soft tissue inside.
Ecological Role
Acts as a key marine predator regulating bivalve populations in sandy benthic ecosystems. Serves as food for various marine mammals, fish, and large crustaceans.
Similar Species
Lumina mamillata or other Natica species, which can be distinguished by specific patterns, umbilical callus structures, and geographic distribution.
Beach Finding Tips
Look along sandy beaches at low tide, particularly near sandbars or after storms when shifting sands uncover buried shells.