Tiger Cowrie
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Cypraeidae, Genus: Cypraea, Species: tigris · Cypraeidae (Cowrie family) · Gastropod (snail/univalve), whole shells. Egg-shaped (ovate) with a narrow, toothed ventral aperture.
Species
Cypraea tigris
Shell Type
Gastropod (snail/univalve), whole shells. Egg-shaped (ovate) with a narrow, toothed ventral aperture.
Family
Cypraeidae (Cowrie family)
Size
3-4 inches (75-100mm). This is the standard adult size for the species, though exceptional specimens can reach over 5 inches.
Color & Pattern
Base color is creamy-white to tan, densely covered with dark brown to blackish circular spots. One specimen shows a distinctive mantle line. The top-center specimen is beach-worn, revealing the underlying lavender/purple nacre layers.
Rarity
Common to Very Common. It is one of the most prolific and widely distributed large cowries in the world.
Habitat
Shallow subtidal waters, typically found on coral reefs, under coral slabs, or in crevices. They are nocturnal and inhabit depths from 0 to 30 meters.
Geographic Range
Indo-Pacific region, spanning from the eastern coast of Africa to Micronesia and Polynesia, and from southern Japan to northern Australia.
Description
A heavy, glossy, porcelaneous shell with a highly polished surface. The dorsal side is inflated and rounded, while the ventral side is flattened with a long aperture lined with strong, short teeth. Its iconic 'leopard' spotting makes it instantly recognizable.
Key Features
Highly polished finish (natural glaze); dense pattern of dark spots; white base; lavender-tinted inner layers often visible when worn; long straight aperture with white labial teeth.
Collector Value
Low to Moderate ($5 - $20 USD). While beautiful, their abundance makes them affordable. Large 'Gem' specimens over 120mm or those with rare 'melanistic' (all black) patterns are highly prized.
Condition Notes
The specimens range from Good to Fine. Most retain high gloss, though the central lavender shell is 'beach-worn,' having lost its top layers of enamel to sand abrasion. Minimal chipping on the margins.
Interesting Facts
The glossy finish is maintained by the living animal's mantle, which covers the shell. Historically, they were used as sinkers for fishing nets and in many cultures for decoration and divination. Unlike most mollusks, cowries do not have a periostracum.
Ecological Role
They are primarily scavengers and herbivores, feeding on algae and sponges growing on the reef. They serve as a food source for large crustaceans, octopuses, and certain predatory fish.
Similar Species
Cypraea pantherina (Panther Cowrie), which is more elongated and found specifically in the Red Sea, and Cypraea leopardus.
Beach Finding Tips
Look in reef ruble or along the tide line after storms in the Indo-Pacific. They are often found by snorkelers in shallow water during the day hiding in dark crevices.
Notes
Pass