Phylum: Echinodermata 棘皮動物門 Class: Echinoidea 海膽綱 Family: Cidaridae 頭帕海膽科 Scientific name: Stylocidaris affinis Chinese name: Author: (Philippi, 1845) Size: 41.09mm Description: 41.09mm, Trawled at 50m. North Aegean Sea. Enez. Turkey. August, 2013.