Eye-Of-Judas Purpura Shell, Thais planospira: The Eye-Of-Judas Shell is a thick yellowish-brown shell that is white within except for reddish ribs inside the outer lip and on the columella.
Across the deep channel in the middle of the columella is an oblique black rib which is most unusual making the shell very easy to identify.
They are well protected attack by most predators due to the thickness of the shells.
They reach 8.3 cm (3.3 inches) in width.
Eye-Of-Judas Purpura Shells range from Cabo San Lucas and south along the coast to Peru and can be found on and around rocks at low tides.
The shells are sold commercially via a lively internet trade and deemed to be of significant value.
The Eye-Of-Judas Purpura Shell is a member of the Muricidae Family and Thais Genus which consists of a number of species of medium to large size gastropods varying in length from 3 to 13 cm. They go via the common name of rock shells or dog winkles. The shells are generally squat, short-spired, and solid with a large body whorl. The sculpture varies according to the species but generally consists of ribs, riblets, nodules, and tubercles. The animals are predatory, living in rocky environments close to shore or in the intertidal zone.