Money Cowrie
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Cypraeidae, Genus: Monetaria, Species: Monetaria moneta · Cypraeidae (Cowrie family) · Gastropod (univalve); Oval-ovate/delta shape. Whole shell specimen.
Species
Monetaria moneta
Shell Type
Gastropod (univalve); Oval-ovate/delta shape. Whole shell specimen.
Family
Cypraeidae (Cowrie family)
Size
Approximately 18-22mm in length. This is within the standard adult range of 10-40mm for the species.
Color & Pattern
Pale greenish-yellow to off-white base. The dorsal surface shows faint banding and a slightly darker, cloudy central area. The base and margins are typically creamy white. The colors appear natural but slightly weathered.
Rarity
Very Common. One of the most abundant cowrie species in its range.
Habitat
Shallow tropical waters, often found in intertidal zones, under rocks, or in shallow coral reef crevices and seagrass beds.
Geographic Range
Indo-Pacific region, extending from East Africa and the Red Sea to the central Pacific islands and the Galapagos.
Description
A small, sturdy, somewhat humped shell with a flattened base. The margins are often thickened and slightly irregular or knobby. The aperture is narrow and lined with small, distinct teeth on both the columellar and labrum sides. It has a high-gloss finish when fresh, though this beach-worn specimen shows a more matte, calcified texture.
Key Features
Distinguished by its somewhat hexagonal or deltoid outline, flattened base, and the characteristic pale yellow-green hue. It lacks the bright orange ring of its close relative, the Gold-ring Cowrie.
Collector Value
Low monetary value ($0.50 - $2.00) due to extreme abundance, but high historical and educational value. Most desirable specimens are 'Gem' quality with high gloss and deep color.
Condition Notes
Fair to Good. The shell is intact with no major chips, but it shows signs of beach wear (loss of high gloss/sheen) and some minor surface staining/erosion on the dorsal side.
Interesting Facts
This species was once the most widely used form of shell money in history, traded across Africa, Asia, and Oceania for centuries. In some cultures, it remains a symbol of wealth and fertility.
Ecological Role
Algivorous scavenger that grazes on algae and detritus on rocks and coral. It serves as a food source for various crustaceans and octopuses.
Similar Species
Monetaria annulus (Gold-ring Cowrie), which is distinguished by a bright orange-yellow ring on the dorsal side and a rounder shape.
Beach Finding Tips
Look in shallow tide pools at low tide, especially under loose coral rubble or rocks. They are often found in large groups in areas with abundant algae.