Checkered Nerite (also known as the Antillean Nerite)
Phylum Mollusca, Class Gastropoda, Order Cycloneritida, Family Neritidae, Genus Nerita, Species Nerita tessellata · Neritidae (Nerite family) · Gastropod (snail/univalve), whole shell with a globose, spiral shape
Species
Nerita tessellata
Shell Type
Gastropod (snail/univalve), whole shell with a globose, spiral shape
Family
Neritidae (Nerite family)
Size
Approximately 0.5 to 0.8 inches (12-20 mm), which is typical for an adult of this species. Adults generally range from 0.5 to 1 inch.
Color & Pattern
Features a distinctive checkered or tessellated pattern of black or dark purple squares contrasting against a whitish, gray, or yellowish-white background. The spire is low and rounded, and the colors are completely natural with sharp pattern definition.
Rarity
Common, frequently found clinging to rocks in its natural habitat and occasionally washed ashore.
Habitat
Found primarily in the high to mid-intertidal zone, clinging tenaciously to rocky shores, limestone cliffs, and mangrove roots where they are regularly exposed to air and wave action. Marine environment.
Geographic Range
Western Atlantic region, including southern Florida, the Bahamas, the Caribbean Sea, the Gulf of Mexico, and down to northern South America.
Description
A robust, low-spired marine snail shell characterized by its rounded, globose shape and thick structure designed to withstand heavy wave impact. The surface exhibits prominent spiral cords intersected by axial lines creating the classic checkered pattern. The aperture is semicircular with a toothed outer and inner lip.
Key Features
Low rounded spire, thick calcareous shell wall, distinct checkered black-and-white tessellated color pattern, and teeth or denticles along the columellar lip of the aperture.
Collector Value
Low to moderate value. While widely collected for beginner displays or crafting due to their attractive patterns, they are too common to command high prices among advanced collectors. Typically sold inexpensively in souvenir shops.
Condition Notes
The specimen appears to be in Good to Fine condition with intact pattern coloration, minimal wear, and a well-preserved aperture rim, though minor natural erosion may be present on the apex.
Interesting Facts
Nerites are exceptionally hardy gastropods capable of surviving extended periods out of water by sealing their operculum tightly. They graze on microscopic algae using a specialized ribbon-like tongue called a radula.
Ecological Role
Acts as an important primary consumer and algae grazer on rocky intertidal shores, helping control algal growth and serving as a food source for coastal birds, crabs, and fish. Not currently regulated or endangered.
Similar Species
Bleeding Tooth Nerite (Nerita peloronta) and Four-toothed Nerite (Nerita versicolor). Distinguished by the bright red coloration on the teeth of the Bleeding Tooth and the more varied, colorful banding of N. versicolor.
Beach Finding Tips
Look along rocky intertidal zones, jetties, and limestone outcrops during extremely low tides. Search crevices and above the waterline where they gather in clusters to avoid desiccation.