Checkered Nerite, Bleeding Tooth Nerite (Eroded/Torn)
Phylum: Mollusca, Class: Gastropoda, Order: Cycloneritida, Family: Neritidae, Genus: Nerita, Species: Nerita tessellata · Neritidae (Nerite family) · Gastropod (univalve); Globose/Turbinated shell shape
Species
Nerita tessellata (Confidence: 85%)
Shell Type
Gastropod (univalve); Globose/Turbinated shell shape
Family
Neritidae (Nerite family)
Size
Approximately 15-20mm (0.6-0.8 inches). This falls within the standard adult range of 10-25mm for this genus.
Color & Pattern
Heavy black and white checkering or mottling. The patterns appear somewhat weathered, with the darker pigments remaining more prominent against a faded cream or grayish-white base. The markings are somewhat irregular due to shell wear.
Rarity
Very Common. These are among the most frequently encountered shells on rocky Caribbean shorelines.
Habitat
Intertidal zone, specifically the high-tide splash zone. These are 'rock-dwelling' snails found clinging to boulders and rocky shorelines, often exposed to air.
Geographic Range
Tropical Western Atlantic; ranging from Florida and the Gulf of Mexico through the Caribbean Sea to Brazil.
Description
A sturdy, thick-walled globose shell with a low spire. The surface is characterized by strong spiral cords that create a textured, rib-like appearance. In this specimen, the apex is somewhat eroded, which is typical for snails living in high-energy surf zones. The aperture is large and semi-circular.
Key Features
Checkered color pattern; strong spiral ribs; thick, heavy shell for its size; flattened labial area (inner lip) which often contains small teeth or 'pustules' diagnostic of the Nerita genus.
Collector Value
Minimal financial value ($0.50 - $1.00). It is a common 'beach find' specimen. Its value is primarily educational or sentimental as a representative of Caribbean rocky-shore fauna.
Condition Notes
Fair condition. The shell shows significant surf-wear and erosion on the spire, and the outer lip appears chipped or woren away. It lacks the 'gem' quality of a live-taken specimen but preserves the diagnostic color pattern.
Interesting Facts
Nerites are incredibly hardy; they can survive long periods out of water by trapping moisture inside their shell with a tightly fitting operculum. Historically, different species of Nerites have been used as beads or in artisanal jewelry due to their durability.
Ecological Role
Grazer. They play a vital role in controlling algal growth on intertidal rocks. They are a food source for shorebirds and predatory crabs.
Similar Species
Nerita peloronta (Bleeding Tooth), which is larger and has a distinct red stain on the columella, and Nerita versicolor (Four-toothed Nerite), which has more colorful pinkish or zig-zag patterns.
Beach Finding Tips
Look along rocky jetties, limestone outcrops, or in tide pools at low tide. They are rarely found in the sand; they prefer to adhere to the underside or crevices of rocks.