Checkered Nerite, also known as the Common Nerite or Tessellated Nerite
Phylum: Mollusca, Class: Gastropoda, Order: Cycloneritida, Family: Neritidae, Genus: Nerita, Species: Nerita tessellata · Neritidae (Nerite family) · Gastropod (snail/univalve), whole shell, ovate to globose shape
Species
Nerita tessellata
Shell Type
Gastropod (snail/univalve), whole shell, ovate to globose shape
Family
Neritidae (Nerite family)
Size
Approximately 0.75 inches (20 mm) in length, which is average to large for this species. Adults typically range from 0.5 to 1 inch.
Color & Pattern
Characterized by a striking black and white checkered or tessellated pattern, often with shades of grey, olive, or yellowish-white squares. The colors appear natural and well-preserved with distinct contrast.
Rarity
Common, frequently found clinging to intertidal rocks throughout its natural geographic range.
Habitat
Found primarily in the intertidal zone, clinging to rocks, limestone cliffs, and mangrove roots in high-energy or moderately exposed marine environments.
Geographic Range
Widespread throughout the tropical Western Atlantic, including southern Florida, the Caribbean, the Bahamas, and down to northern South America.
Description
A sturdy, compact marine snail shell featuring a low, rounded spire and a smooth, polished exterior. The outer surface displays a classic checkerboard pattern of dark and light patches. The aperture is semicircular with a toothed outer lip and a flattened columellar deck bearing tiny denticles.
Key Features
Distinguished by its low spire, solid construction, flattened inner columellar lip with small teeth, and the distinct black-and-white checkered exterior color pattern.
Collector Value
Low to moderate commercial value; commonly collected by beachcombers and beginner shell enthusiasts rather than specialized collectors, typically valued at just a few cents to a dollar per specimen.
Condition Notes
The shell is in Fine to Gem condition, fully intact with strong natural coloration, minimal erosion, and a well-preserved aperture and lip.
Interesting Facts
Nerites are exceptionally hardy intertidal snails capable of surviving out of water for extended periods during low tide by sealing their aperture tightly with a calcified operculum. They graze on microscopic algae using a ribbon-like radula.
Ecological Role
Acts as an important marine herbivore grazing on microalgae, helping to control algae growth on intertidal rocks. Serves as a food source for shorebirds and carnivorous marine gastropods.
Similar Species
Bleeding Tooth Nerite (Nerita peloronta) and Stained Nerite (Nerita versicolor), which can be distinguished by their unique aperture colors (such as red/orange teeth) and different exterior banding patterns.
Beach Finding Tips
Search rocky shorelines, limestone outcrops, and jetties at low tide. Look closely at crevices and rock faces where these snails tightly cluster above the waterline.