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 with a heavy, spiral shape and distinctive toothed aperture.
Species
Nerita peloronta
Shell Type
Gastropod (univalve) whole shell with a heavy, spiral shape and distinctive toothed aperture.
Family
Neritidae (Nerite family)
Size
Approximately 0.75 inches (2 cm) long and wide, which is average for an adult specimen of this species. Adults typically range from 0.75 to 1.25 inches.
Color & Pattern
The exterior features a yellowish-cream background with zigzag patterns of black and deep reddish-brown lines. The most striking feature is the bright, blood-red staining on the inner lip (columella) that gives the species its common name. The interior of the aperture is bright white with prominent, heavy dentition.
Rarity
Common (frequently found by beachcombers exploring rocky shorelines and intertidal areas within its range).
Habitat
Found primarily in the intertidal zone, specifically on rocky shores, limestone formations, and exposed intertidal rocks where they cling tenaciously to withstand strong wave action. They are marine animals that can tolerate periods of exposure to air.
Geographic Range
Widespread throughout the tropical Western Atlantic, including southern Florida, the Bahamas, the Caribbean Sea, Bermuda, and down to the coast of Brazil.
Description
A robust, globose, and heavy shell featuring a low spire and a thick, porcelain-like outer surface. The most remarkable characteristic is its aperture, which features a flattened white columella bordered by two bright crimson-red teeth that look remarkably like blood drops, flanked by coarse, heavy teeth along both the outer and inner lips.
Key Features
The presence of two bright red 'teeth' on the inner lip (columella) alongside a distinct blood-red blotch, combined with heavy dentition inside the outer lip and a thick, rounded, low-spired globose shape.
Collector Value
Low to moderate value. While very popular among casual shell collectors and tourists due to their unique and vivid coloration, they are common enough that fine specimens generally cost only a few dollars.
Condition Notes
The specimen shown is in very good to fine condition, retaining its bright natural coloration, sharp aperture teeth, and characteristic red columellar markings with minimal wear.
Interesting Facts
Unlike many snails that prefer to hide in soft sand or mud, Bleeding Tooth Nerites are active climbers on wave-swept rocks at night to graze on microscopic algae. During the day, they often cluster together in crevices to conserve moisture.
Ecological Role
As herbivorous grazers, Nerites play a crucial role in controlling microalgae growth on intertidal rocks, thereby maintaining the balance of rocky shore ecosystems. They serve as an important food source for various shorebirds and predatory marine snails.
Similar Species
Nerita tessellata (Tessellated Nerite) and Nerita versicolor (Four-toothed Nerite). They can be distinguished by the lack of the distinctive blood-red columellar teeth and different exterior checkerboard or banding patterns.
Beach Finding Tips
Look along rocky intertidal shorelines, limestone outcroppings, and tide pools during low tide. They are often found clustered tightly together in rock crevices or high up in the spray zone.