Tiger Bean (alternate names: Bean Cowrie, Atlantic Yellow Cowrie)
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Cypraeidae, Genus: Macrocypraea, Species: Macrocypraea zebra · Cypraeidae (Cowrie family) · Gastropod (snail/univalve), whole shell, ovate to bean-shaped form
Species
Macrocypraea zebra
Shell Type
Gastropod (snail/univalve), whole shell, ovate to bean-shaped form
Family
Cypraeidae (Cowrie family)
Size
Approximately 1.5 inches in length, which is on the smaller side for this species. Adults typically range from 2 to 4.5 inches.
Color & Pattern
Rich golden-brown or chestnut background featuring lighter cream to white irregular banding and blotches across the dorsum. The surface has a glossy, porcelain-like natural luster.
Rarity
Uncommon to Rare for well-preserved beach specimens, requiring dedicated searching in suitable rocky or reef habitats.
Habitat
Found primarily in shallow subtidal waters, often hiding under coral rubble, rocks, and ledges in reef environments and rocky areas. Marine species.
Geographic Range
Western Atlantic, including the Caribbean Sea, southern Florida, the Bahamas, and parts of Central and South America.
Description
An attractive, smooth, and rounded ovate shell exhibiting the classic high-gloss finish typical of cowries. The dorsum is plump with a rich brown and cream mottled pattern. While the ventral side and aperture are not clearly visible in this view, the dorsal profile displays robust, rounded contours characteristic of immature or smaller adult specimens.
Key Features
Smooth, glossy porcelain-like exterior without prominent ribs or spires, distinct bean-like ovate profile, and characteristic warm brown and cream spotted or banded patterning.
Collector Value
Moderately high desirability among cowrie collectors. Pristine specimens with rich coloration command higher prices, typically ranging from $10 to $30 depending on precise size and locale data.
Condition Notes
Appears to be in Good to Fine condition with intact form and retained natural glossy finish, showing minimal beach wear or bleaching.
Interesting Facts
Cowries were historically used as a form of currency across parts of Africa and Asia. The living animal possesses a mantle that can cover the shell entirely, keeping it polished and free of algae.
Ecological Role
Grazing herbivores that feed primarily on algae and encrusting organisms on reefs, helping maintain algal balance. They are preyed upon by specialized carnivorous snails, octopuses, and fish.
Similar Species
Atlantic Deer Cowrie (Macrocypraea cervus), which is generally larger and tends to feature white spots encircled by darker rings rather than broad bands.
Beach Finding Tips
Look along tropical or subtropical reef-fringed shorelines after storms, and meticulously check under large flat rocks, coral slabs, and crevices during very low tide.