Dark Rock Shell
NameDark Rock Shell
Scientific NameMorula marginalba
Common NameDark Rock Shell, Mulberry Whelk, Black-mouthed Rock Shell
FamilyMuricidae
GenusMorula
Speciesmarginalba
Geographic DistributionIndo-Pacific region, widely distributed along the coasts of Australia (Queensland, New South Wales, Victoria, South Australia, Western Australia) and New Zealand.
Habitatintertidal
Shell Shapeconical
Average Size (mm)Typically ranges from 15 mm to 30 mm in length.
Identifying FeaturesDark, robust shell with a low spire; distinctive dark, toothed outer lip of the aperture; white columella; and bluish-white aperture interior. The exterior may have spiral cords and axial nodules, though these are often worn smooth.
Raritycommon
Author Citation(Blainville, 1832)
Description
A robust, dark-colored marine gastropod shell, characterized by its turbinate shape, low spire, and wide aperture. The exterior is typically dark brown to black, often appearing dull or eroded. The interior of the aperture is striking, featuring a bluish-white to white inner surface, a prominent white columella, and a dark purplish-black outer lip adorned with distinct white teeth or lirae. This species is commonly found on rocky intertidal shores.
