Checkered Nerite, also known as the Tessellated Nerite
Phylum: Mollusca, Class: Gastropoda, Order: Neritida, Family: Neritidae, Genus: Nerita, Species: Nerita tessellata · Neritidae (Nerite family) · Gastropod (snail/univalve), whole shell, spiral shape
Species
Nerita tessellata
Shell Type
Gastropod (snail/univalve), whole shell, spiral shape
Family
Neritidae (Nerite family)
Size
Approximately 0.5 to 0.75 inches, which is average for this species. Adults typically range from 0.4 to 0.9 inches.
Color & Pattern
Features a distinct checkered or tessellated pattern consisting of black or dark gray squares alternating with white or light gray spots on the exterior surface. The apex shows a yellowish hue. The colors are natural, though slightly weathered from exposure.
Rarity
Very Common
Habitat
Found primarily in the intertidal zone, specifically on rocky shores, limestone formations, and jetty rocks where they are subjected to wave action and intermittent exposure to air.
Geographic Range
Western Atlantic, including southern Florida, the Caribbean, the Gulf of Mexico, and down to northern South America.
Description
A small, sturdy, globular marine snail shell with a low spire and a flat, toothed inner lip (columella). The surface displays a striking checkered pattern of dark and light markings. The whorls are compact and smooth with subtle growth lines, and the aperture is semicircular.
Key Features
Distinct black-and-white checkered pattern, low-spired rounded whorls, and a flattened inner lip bearing small denticles or teeth along the margin.
Collector Value
Low to moderate commercial value. While widely collected due to their abundance, they are common staples in shell crafts and beginner collections rather than high-value collector pieces. Typically worth less than a dollar individually.
Condition Notes
Fair to Good condition. The shell is intact with some minor surface weathering and loss of glossy finish due to wave wear, typical of beach or intertidal finds.
Interesting Facts
Nerites are exceptionally hardy gastropods capable of surviving out of water for extended periods by sealing their operculum tightly. They graze on microalgae using a specialized radula.
Ecological Role
Acts as an important herbivore in the intertidal rocky shore ecosystem by grazing on algae, helping to control algal growth on rocks. They serve as prey for various shorebirds and predatory fish.
Similar Species
Bleeding Tooth Nerite (Nerita peloronta), which features red teeth-like markings on the aperture, and the Four-toothed Nerite (Nerita versicolor), which has a more colorful banded pattern.
Beach Finding Tips
Look along rocky intertidal zones, breakwaters, and limestone outcroppings at low tide. They are often found clustered together in rock crevices or depressions.