Stereocidaris granularis var. rubra Mortensen

Family: Cidaridae/Stereocidarinae

Order: Cidaroida

Locality: Philippines, Siquijor, 250 feet, 2006

Dimensions: 70 mm
longest spine 90 mm

This specimen seems to be a true Stereocidaris granularis var. rubra, which differs from a typical S. granularis by its intense red colour, both on test and spines (Th. Mortensen, A Monograph of the Echinoidea, I, Cidaroidea, 1928, page 245)