Phylum: Echinodermata 棘皮動物門
Class: Echinoidea 海膽綱
Family: Echinometridae 長海膽科
Scientific name: Heterocentrotus mammillatus
Chinese name: 鉛筆海膽
Author: Linnaeus, 1758
Size: 48x40x 23mm
Description: Sea Urchin, diameter: 48x40x 23mm , taken in Olango Island , Cebu , Philippines .
Heterocentrotus mammillatus, Aboral view(反口面).
Heterocentrotus mammillatus, Oral view(口面).
Heterocentrotus mammillatus, Lateral view(側面).
Heterocentrotus mammillatus, Lateral view(側面).
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