Turban Shell (or Nerite)
Phylum: Mollusca, Class: Gastropoda, Order: Cycloneritida, Family: Neritidae, Genus: Nerita, Species: Nerita undata · Neritidae (Nerite family) · Gastropod, whole shell, spiral shape
Species
Nerita undata
Shell Type
Gastropod, whole shell, spiral shape
Family
Neritidae (Nerite family)
Size
Approximately 0.5 to 1 inch, which is average for this species.
Color & Pattern
Whitish-cream base color with subtle brownish markings near the apex and interior of the aperture showing white enamel and small teeth on the columella.
Rarity
Common
Habitat
Intertidal zone, typically found on rocky shores, mangrove roots, and coral rubble.
Geographic Range
Indo-Pacific region including Maluku, Indonesia, spreading across tropical shallow marine waters.
Description
A small, thick, globular marine snail shell with a low spire, smooth interior lip, and strong denticles on the columella. The exterior shows classic nerite spiral ridges and weathered coloration.
Key Features
Low spire, thick robust shell structure, flattened columella with small teeth, and rounded body whorl.
Collector Value
Low commercial value, commonly collected by beachcombers in the Indo-Pacific.
Condition Notes
Fair condition, slightly worn and sun-bleached with minor abrasion on the apex.
Interesting Facts
Nerites are famous for their ability to breathe air and survive out of water for extended periods during low tides by sealing their aperture with a strong calcareous operculum.
Ecological Role
Grazing herbivores that feed on microalgae, helping to control algae growth on intertidal rocks and providing an important food source for shorebirds and crabs.
Similar Species
Other Nerita species such as Nerita polita or Nerita albicilla, distinguished by surface texture and aperture dentition.
Beach Finding Tips
Look along rocky intertidal shorelines and tide pools at low tide, especially among crevices and under rocks.
Notes
Maluku