Scotch Bonnet (also known as the Banded Bonnet)
Phylum: Mollusca, Class: Gastropoda, Order: Littorinimorpha, Family: Cassidae, Genus: Phalium, Species: Phalium granulatum · Cassidae (Helmet and Bonnet family) · Gastropod (snail/univalve), whole shell, spiral shape with prominent outer lip
Species
Phalium granulatum
Shell Type
Gastropod (snail/univalve), whole shell, spiral shape with prominent outer lip
Family
Cassidae (Helmet and Bonnet family)
Size
Approximately 2 to 3 inches in length, which is average for this species. Adults typically range from 2 to 4 inches.
Color & Pattern
Glossy surface featuring a creamy-white or pale beige base with distinctive rows of warm brownish-orange or yellowish-brown square patches and bands. The outer lip is highlighted by rich, vibrant orange-brown banding and thickened margins.
Rarity
Common to Uncommon, frequently sought after by beachcombers in the southeastern United States and the Gulf of Mexico.
Habitat
Found in shallow subtidal waters down to moderate depths, typically inhabiting sandy ocean floors, offshore sandbars, and near-shore marine environments.
Geographic Range
Western Atlantic Ocean, ranging from North Carolina down through the Gulf of Mexico, the Caribbean, and south to Brazil.
Description
An exquisite and highly recognizable marine snail featuring an inflated, rounded body whorl, a low spire, and a distinctively flared, thickened outer lip with a series of small denticles inside. The surface exhibits a glossy sheen with sculpted spiral cords and characteristic square-spotted banding.
Key Features
Inflated body whorl, low spire, thick flared outer lip with brownish-orange banding, and rows of square or rectangular brownish spots arranged in spiral bands.
Collector Value
Moderately high collector value, particularly prized for specimens with bright, unfaded orange coloration and intact lips. Commonly found in shell shops and cherished by coastal beachcombers.
Condition Notes
Good to Fine condition, displaying vibrant natural coloration and a glossy finish with minor wear along the outer lip margin.
Interesting Facts
Living Scotch Bonnet snails are carnivorous predators that specialize in hunting sea urchins and sand dollars, using their acidic secretions and radula to bore through or pry open their prey's armor.
Ecological Role
Acts as an important mid-level marine predator controlling sea urchin and echinoderm populations in sandy benthic ecosystems.
Similar Species
Banded Bonnet (Phalium interruptum) found in the Indo-Pacific, which can be distinguished by subtle differences in geographic origin and spotting patterns.
Beach Finding Tips
Best found on sandy beaches after major storms or rough wave action, particularly along the Gulf coast of Florida and the Carolinas during low tide.