Talk:Echinoidea
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Black urchin
(Arbacia lixula). -
White urchin
(Tripneustes ventricosus). -
Savigny's diadem urchin
(Diadema savignyi). -
Red urchin
(Astropyga radiata). -
Fire urchin
(Asthenosoma varium). -
Flower urchin
(Toxopneustes pileolus). -
Giant red urchin
(Strongylocentrotus franciscanus). -
Pencil urchin
(Heterocentrotus mammillatus). -
Stick urchin
(Phyllacanthus imperialis). -
Slate pencil urchin
(Eucidaris tribuloides). -
Shingle urchin
(Colobocentrotus atratus). -
Heart urchin
(Spatangus purpureus). -
Sand dollar
(Mellita longifissa).