Muricid Murex or Mulberry Shell (Prickly Drupe)
Phylum: Mollusca, Class: Gastropoda, Order: Neogastropoda, Family: Muricidae, Genus: Drupella, Species: D. cornus · Muricidae (Murex and Rock Shell family) · Gastropod (univalve) whole shell with spiral shape and heavy nodulous sculpture
Species
Drupella cornus (or related Muricidae sp.)
Shell Type
Gastropod (univalve) whole shell with spiral shape and heavy nodulous sculpture
Family
Muricidae (Murex and Rock Shell family)
Size
Approximately 1 to 1.5 inches, which is typical for adult specimens of this general rock-dwelling predatory group.
Color & Pattern
Chalky white to light grey base color with worn nodulous projections. Appears sun-bleached with loss of any original dark brown or reddish mottled patterns typical of live specimens.
Rarity
Common in its native range, though well-preserved specimens with intact patterns are less commonly collected as beach-worn shells.
Habitat
Shallow subtidal and intertidal marine environments, specifically coral reefs and rocky shores where they feed on coral polyps.
Geographic Range
Indo-Pacific region, spanning from the Red Sea and East Africa across to Polynesia and the Great Barrier Reef.
Description
A compact, heavily textured rock shell adorned with rows of sharp knobs and nodules covering the exterior surface. The shell features a short spire and a thick, sturdy structure designed to withstand turbulent wave action in rocky intertidal zones and coral reef environments.
Key Features
Heavy nodulation and tubercles covering the whorls, a compact oval outline, and a small, restricted aperture protected by a heavily armored exterior.
Collector Value
Low collector value due to the heavily worn, bleached condition and the presence of a boring hole. Usually valued primarily as a casual beach find rather than a specimen piece.
Condition Notes
Fair condition. The shell is heavily sun-bleached and worn, featuring a distinct predator boring hole near the upper whorl. Collectibility grade is Fair.
Interesting Facts
Certain members of the Muricidae family are infamous for outbreaks that devastate live coral reefs by consuming massive amounts of coral tissue. Historically, muricids were also the source of the prized Tyrian purple dye used by ancient civilizations.
Ecological Role
Functions as a carnivorous predator in coral reef ecosystems, preying on sessile invertebrates and playing a complex role in reef dynamics and coral population regulation.
Similar Species
Other members of the Muricidae and Columbellidae families, such as Morula granulata, which can be distinguished by specific aperture dentition and nodule arrangements.
Beach Finding Tips
Look along rocky shorelines, tide pools, and reef rubble zones during extreme low tides, especially after storms that churn up offshore debris.