Phylum： Echinodermata 棘皮動物門
Class： Echinoidea 海膽綱
Family： Cidaridae 頭帕海膽科
Scientific name： Cidaris cidaris
Author： (Linnaeus, 1758)
Description： 47.17x40.82mm, with some spines, Mediterranean
Acknowledgement：This specimen is one of those echinoidea specimens that were exchanged from my friend Marco Fantin (Italy). I would like to express my thanks to him to broaden my echinoidea collection.