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, whole shell, spiral shape
Species
Nerita peloronta
Shell Type
Gastropod, whole shell, spiral shape
Family
Neritidae (Nerite family)
Size
Approximately 0.75 to 1 inch in length and width, which is average for this adult species. Adults typically range from 0.5 to 1.2 inches.
Color & Pattern
Characterized by a pale background with alternating zigzag or spiral bands of black, grey, or reddish-brown. The aperture features distinctive bright reddish-orange teeth that resemble bleeding gums or a bloody tooth, giving the species its common name.
Rarity
Common, frequently found by beachcombers exploring rocky coastal areas and limestone outcroppings within its native range.
Habitat
Found primarily in the supralittoral and upper intertidal zones on rocky shores, limestone formations, and splash zones above the high tide mark. It is a marine species capable of surviving out of water for extended periods.
Geographic Range
Widespread throughout the tropical Western Atlantic, including southern Florida, the Bahamas, the Caribbean Sea, and along the coast of northern South America.
Description
This is a solid, globular, low-spired gastropod with a thick shell and a smooth to finely textured exterior. The aperture is heavily toothed on the inner lip, showcasing a vivid reddish-orange stain surrounding white teeth, which creates the striking appearance of a bleeding tooth. The outer lip is sharp and finely serrated on the inside.
Key Features
The definitive diagnostic feature is the bright blood-red or orange stain on the columellar lip accompanied by one or two tooth-like projections that look remarkably like a bleeding tooth, combined with zigzag dark bands on the exterior.
Collector Value
Low to moderate commercial value. While very popular among casual shell collectors due to its striking appearance and vivid aperture, it is too common to command high prices, typically worth a few dollars or valued as a fun novelty find.
Condition Notes
The specimen appears to be a weathered or partially worn whole shell with some fading of the exterior pattern, but retains the distinctive reddish aperture coloring. Condition is graded as Good to Fair for a beach-worn specimen.
Interesting Facts
Nerites are exceptionally hardy marine snails with gilled lungs adapted to breathing air when exposed during low tide. They graze on microscopic algae using a ribbon-like radula and play an important role in keeping intertidal rocks clean of algal growth.
Ecological Role
As primary herbivorous grazers in the intertidal zone, they help regulate microalgal populations on rocky substrates. They serve as a vital food source for coastal shorebirds, crabs, and predatory fish.
Similar Species
Other nerite species such as the Four-toothed Nerite (Nerita versicolor) and the Tessellated Nerite (Nerita tessellata). They can be distinguished by the specific patterns on their exterior and the absence of the signature red 'bleeding tooth' stain on the columella.
Beach Finding Tips
Look along rocky shores, limestone tide pools, and crevices above the high-tide line during low tide. They often aggregate in clusters in protected rock depressions to avoid drying out.