Money Cowrie (also known as Money Cowry)
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Cypraeidae, Genus: Monetaria, Species: Monetaria moneta · Cypraeidae (Cowrie family) · Gastropod (snail/univalve), whole shell, ovate or oval shape
Species
Monetaria moneta
Shell Type
Gastropod (snail/univalve), whole shell, ovate or oval shape
Family
Cypraeidae (Cowrie family)
Size
Approximately 0.75 inches (20 mm) in length, which is average for this species. Adults typically range from 0.5 to 1.5 inches (10 to 40 mm).
Color & Pattern
Pale yellowish to creamy white base color with a distinct yellowish-green or greenish-white dorsal mantle area. The margins and base are lighter white, and the surface has a smooth, porcelain-like natural gloss.
Rarity
Very Common
Habitat
Shallow intertidal and subtidal zones, commonly found under rocks, coral rubble, and in shallow pools on coral reefs and rocky flats.
Geographic Range
Indo-Pacific region, extending from East Africa and the Red Sea across the Indian Ocean to Polynesia and the western coast of the Americas.
Description
A classic, smooth porcelain-like cowrie with a distinctively flattened base and rounded margins. The dorsal side is domed and features a pale yellowish-green hue, while the underside is flat and white with fine, tooth-like ridges lining the narrow, elongated aperture.
Key Features
Ovate and somewhat flattened shape, pale yellow-green dorsal coloring, rounded and thickened margins, and a narrow aperture lined with distinct white teeth on both sides.
Collector Value
Low to moderate commercial value due to its abundance, though highly valued historically and educationally. Specimens are very common in shell shops and typically inexpensive.
Condition Notes
The shell appears to be in good to fine condition, intact with a natural glossy finish and clear aperture teeth, showing minimal wear and no significant boring holes.
Interesting Facts
Monetaria moneta is historically famous for being used as a form of currency across many parts of Africa, Asia, and the Pacific islands for centuries before the introduction of modern coinage.
Ecological Role
Functions primarily as a grazing herbivore feeding on algae and detritus on coral reefs. It serves as prey for various predatory marine snails, fish, and cephalopods, and plays a vital role in maintaining reef health.
Similar Species
Ring Cowrie (Monetaria annulus), which is easily distinguished by the bright orange or yellow ring on its dorsal surface.
Beach Finding Tips
Look under flat rocks, coral slabs, and inside crevices during extreme low tides in shallow reef flats and intertidal zones throughout the Indo-Pacific.