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 (snail/univalve), whole shell, hemispherical or globose shape
Species
Nerita peloronta
Shell Type
Gastropod (snail/univalve), whole shell, hemispherical or globose shape
Family
Neritidae (Nerite family)
Size
Approximately 0.75 to 1 inch in length, which is average for this species. Adults typically range from 0.75 to 1.5 inches.
Color & Pattern
Characterized by a creamy-white or yellowish base heavily marked with broad, zigzag or wavy bands of dark brown, reddish-brown, or black. The aperture features distinctive bright red or orange teeth-like projections on the inner lip that resemble bleeding teeth, giving the species its common name.
Rarity
Common
Habitat
Found in the intertidal zone, typically clinging tightly to rocky shores, limestone cliffs, and wave-swept intertidal rocks just above the high tide line, though they can endure prolonged exposure to air and sun. Marine environment.
Geographic Range
Western Atlantic, including southern Florida, the Bahamas, the Caribbean Sea, Bermuda, and down to the northern coast of South America.
Description
A robust, globose marine snail shell with a low, rounded spire and a heavy, thick wall designed to withstand pounding surf and desiccation. The outer surface exhibits smooth growth lines and striking zigzag patterns of brown and white. The aperture is heavily toothed along the inner lip with characteristic blood-red stains resembling bleeding teeth.
Key Features
Globose shape, thick and sturdy shell structure, low spire, and most importantly, the bright red or orange coloration on the inner lip (columella) that resembles bleeding teeth.
Collector Value
Low to moderate value. While widely collected as a souvenir by beachcombers in the Caribbean and Florida, pristine specimens with bright, unfaded apertures are prized by beginning to intermediate shell enthusiasts.
Condition Notes
The specimen appears worn and weathered with some natural erosion of the outer pattern due to wave action, but remains structurally intact and recognizable. Overall collectibility grade is Good.
Interesting Facts
Bleeding tooth nerites are exceptionally well-adapted to terrestrial life for marine snails. They breathe air using a modified mantle cavity acting as a lung and actively forage on algae out of the water at night, returning to preferred crevices or home scars before sunrise.
Ecological Role
As herbivores, bleeding tooth nerites play an important ecological role in intertidal zones by grazing on microalgae and biofilm, helping to keep rock surfaces clean. They serve as a food source for coastal birds, crabs, and fish.
Similar Species
Tessellated Nerite (Nerita tessellata), which lacks the prominent red bleeding-tooth markings on the columella and features a checkered black and white pattern instead.
Beach Finding Tips
Look along rocky shores, limestone outcroppings, and jetty rocks during extreme low tide. Search crevices and cracks where they huddle together during daylight hours to avoid the sun.