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, globose or hemispherical shape
Species
Nerita peloronta
Shell Type
Gastropod univalve, whole shell, globose or hemispherical shape
Family
Neritidae (Nerite family)
Size
Approximately 0.5 inches (12-15 mm) in length and width, which is average for this small species. Adults typically range from 0.4 to 1.0 inch.
Color & Pattern
Off-white or cream base color heavily ornamented with distinctive zigzag or wavy bands of dark brown, reddish-brown, or black. The aperture features a characteristic bright crimson or red stain on the columella, resembling a bleeding tooth, which gives the species its common name.
Rarity
Common to Very Common, frequently encountered by beachcombers exploring rocky shorelines within its natural range.
Habitat
Found primarily in the supralittoral and upper intertidal zones on rocky shores, limestone formations, and coral rubble where they cling tightly to rocks above the waterline during low tide to avoid desiccation.
Geographic Range
Warm waters of the Western Atlantic, including Southern Florida, the Bahamas, the Caribbean Sea, and down to the coast of Brazil.
Description
A small, thick, and sturdy globose marine snail shell featuring a low spire and a smooth yet solidly built exterior. The sculpture exhibits coarse growth lines and flat spirals. The defining feature is the flattened inner lip (columella) adorned with teeth-like denticles and a striking, blood-red splotch that looks remarkably like a bleeding tooth.
Key Features
Rounded, heavy globose shape, low spire, distinctive zigzag brown-and-white patterning, and most importantly, the vivid red stain on the inner columellar margin flanked by small teeth.
Collector Value
Low to moderate commercial value. While popular in beginner shell collections and shell crafts due to its unique red mark, they are too common to command high prices, typically worth a few cents to a dollar.
Condition Notes
The specimen appears mostly intact with moderate natural wear on the surface typical of intertidal tumbling. Coloration shows some mild sun-bleaching but retains its structural integrity. Collectibility grade is Good.
Interesting Facts
Nerites are famous for their remarkable homing abilities, often returning to the exact same crevice or resting spot after foraging for algae during high tide. They are also known for breathing air via a modified mantle cavity when exposed out of water.
Ecological Role
As herbivores, Nerites play an important ecological role in controlling microalgae and biofilm growth on intertidal rocks, serving as a food source for various shorebirds, crabs, and carnivorous marine snails.
Similar Species
Tessellated Nerite (Nerita tessellata) and Four-toothed Nerite (Nerita versicolor), both of which lack the prominent red bleeding-tooth coloration on the columella.
Beach Finding Tips
Search rocky outcroppings, limestone cliffs, and tide pool margins during low tide. Look closely in crevices and cracks where these snails cluster together to escape the sun.