Stramonita biserialis
NameStramonita biserialis
Scientific NameStramonita biserialis
Common NameTwo-row rock shell, Two-row purple snail
FamilyMuricidae
GenusStramonita
Speciesbiserialis
Geographic DistributionEastern Pacific Ocean, ranging from Baja California, Mexico, south to Peru, including the Galápagos Islands.
Habitatintertidal
Shell Shapeconical
Average Size (mm)30-70
Identifying FeaturesDistinguished by its prominent sculpture, featuring strong axial ribs and spiral cords that often form two distinct rows of blunt nodules or spines on the body whorl (hence 'biserialis'). The shell surface may also exhibit fine spiral striae. The siphonal canal is short.
Raritycommon
Author Citation(Blainville, 1832)
Description
A robust, predatory marine snail, commonly known as the two-row rock shell. Its shell is characterized by a strong, nodulose sculpture and a variable color pattern, typically dark brown with lighter markings. It is found in the intertidal and shallow subtidal zones of the Eastern Pacific, where it preys on other mollusks.
