Mulberry Shell / Mulberry Drupe (Thais mutabilis / Muricopsis species)
Phylum: Mollusca, Class: Gastropoda, Order: Neogastropoda, Family: Muricidae, Genus: Muricopsis, Species: Muricopsis mutabilis · Muricidae (Murex and Rock Snail family) · Gastropod (univalve), whole shell, spiral shape with prominent tubercles
Species
Muricopsis mutabilis (or related Muricid species)
Shell Type
Gastropod (univalve), whole shell, spiral shape with prominent tubercles
Family
Muricidae (Murex and Rock Snail family)
Size
Approximately 0.75 to 1 inch in length, which is fairly typical for smaller rock-dwelling muricids. Adults generally range from 0.5 to 1.5 inches.
Color & Pattern
Off-white or cream base color with distinct dark brown to black contrasting nodules or patches encircling the shoulder and spire whorls. The coloration is somewhat weathered and sun-bleached on the lower whorls.
Rarity
Common in appropriate rocky habitats throughout its native range, though finding intact specimens washed up on sandy beaches is less frequent.
Habitat
Found primarily in intertidal and shallow subtidal zones, typically inhabiting rocky shores, coral rubble, and tide pools where they cling tightly to rocks.
Geographic Range
Indo-Pacific region, widely distributed across tropical and subtropical shallow marine waters.
Description
A compact, highly sculptured rock-dwelling gastropod featuring a robust spire and prominent rows of blunt nodules or spines along the whorls. The aperture is relatively small and ovate, leading to a short canal. Its heavy, rugose texture provides excellent camouflage and defense against wave action and predators.
Key Features
Distinctive nodular or tubercle-bearing whorls, a rough and rugose surface texture, small oval aperture, and a stout, compact spire characteristic of rock-dwelling muricids.
Collector Value
Low to moderate commercial value. While widely collected as a representative muricid, they are common enough that individual specimens hold nominal monetary value, though they are great additions to a comprehensive family suite.
Condition Notes
Fair to Good condition. The shell shows some moderate wear and sun-bleaching with a few dark pigmentation spots preserved near the upper whorls. The aperture lip appears slightly worn, grading as a Good collection specimen.
Interesting Facts
Like many members of the Muricidae family, these predatory snails are capable of drilling into the shells of bivalves or prying open barnacles using their strong foot and radula to feed on the soft tissue inside.
Ecological Role
Carnivorous marine snails that play an important predatory role in regulating populations of barnacles, oysters, and other small mollusks in intertidal and rocky shore ecosystems.
Similar Species
Other members of the Muricidae family, such as Morula granulata (Mulberry Shell) or Cronia species. They can be distinguished by subtle differences in nodal ornamentation, aperture teeth, and coloration.
Beach Finding Tips
Search rocky outcroppings, tide pools, and reef flats at extreme low tide. Look carefully among rock crevices and under loose stones where these snails hide from strong waves and direct sunlight.