Bleeding Tooth Nerite (also known as the Common Bleeding Tooth)
Phylum: Mollusca, Class: Gastropoda, Order: Cycloneritida, Family: Neritidae, Genus: Nerita, Species: Nerita peloronta · Neritidae (Nerite family) · Gastropod (univalve), whole shell, spiral shape
Species
Nerita peloronta
Shell Type
Gastropod (univalve), whole shell, spiral shape
Family
Neritidae (Nerite family)
Size
Approximately 0.75 inches (18-25 mm) in length, which is average for this species. Adults typically range from 0.75 to 1.25 inches.
Color & Pattern
Exterior features a robust pattern of zig-zag lines or bands of pale yellow, white, and dark reddish-brown or black. The aperture features distinctive bright red or orange teeth on the inner lip that resemble blood stains, giving the species its common name. The surface appears slightly sun-bleached and worn with chalky white patches.
Rarity
Common in appropriate rocky habitats, though finding a well-preserved specimen can require some searching.
Habitat
Found exclusively in the high intertidal and supralittoral (splash) zones on rocky shores, limestone formations, and coral rubble. They are marine creatures uniquely adapted to spending long periods out of water.
Geographic Range
Widespread throughout the tropical Western Atlantic, including southern Florida, the Bahamas, the Caribbean Sea, Bermuda, and along the northern coast of South America.
Description
A thick, globular, heavy-shelled gastropod with a low spire and a flattened inner columellar lip. The exterior is heavily textured with fine spiral ridges and grooves. The aperture is wide with two prominent red-stained teeth on the inner parietal wall, which visually mimics a bleeding wound against the porcelain-white interior backdrop.
Key Features
The presence of bright red or orange teeth and a corresponding red stain on the columella, combined with a thick, globular shell and zig-zag brown and white color banding.
Collector Value
Low to moderate commercial value. Highly popular among casual beachcombers and beginner shell collectors due to its striking and unmistakable aperture markings, though very common in nature.
Condition Notes
Fair condition. The shell is intact with some surface wear, fading of the original dark pigmentation, and minor chalky white erosion typical of specimens exposed to sun and surf in the high intertidal zone.
Interesting Facts
Nerites are famous among marine biologists for their remarkable adaptations to terrestrial life, possessing both gills and a primitive lung-like mantle cavity to breathe air. They emerge at night to graze on microscopic algae.
Ecological Role
Serves as an important herbivore in the high intertidal rocky shore ecosystem, grazing on microalgae and biofilms, and acts as a food source for shorebirds and coastal predators.
Similar Species
Tessellated Nerite (Nerita tessellata) and Four-toothed Nerite (Nerita versicolor), both of which lack the iconic blood-red staining on the columella characteristic of the Bleeding Tooth.
Beach Finding Tips
Look high up on rocky limestone shorelines, jetties, or consolidated coral rubble just above the high tide line, especially during low tide or after storms.