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''Astropyga radiata'', the red urchin, fire urchin, false fire urchin or blue-spotted urchin, is a species of sea urchin in the family Diadematidae. It is a large species with long spines and is found in the tropical Indo-Pacific region. It was first described in 1778 by the German naturalist Nathaniel Gottfried Leske. ==Description== ''Astropyga radiata'' is a large urchin with a test diameter of up to , flattened or slightly concave on the aboral (upper) side. The spines are up to long and are grouped in five vertical clusters in between which are V-shaped areas with no spines corresponding to the interambulacral plates. These bare areas are red with lines of iridescent blue dots while the colour of the rest of the test and spines varies from reddish-brown to purple, dark brown or nearly black. The spines are long and hollow ; they are of two kinds, the shorter being venomous. The anal sac is prominent, brown with a dark tip. Juveniles have spines with transverse banding and this characteristic sometimes persists into adulthood. File:Astropyga radiata, black and red.JPG|Black and orange specimens seen in Kenya. File:Astropyga radiata2.jpg|An orange specimen in Philippines. File:Astropyga radiata3.jpg|A light specimen in Philippines. File:Astropyga radiata.jpg|A rare, white specimen in Hawaii. File:Astropyga radiata Lembeh.JPG|Young in Indonesia. File:False Fire Urchin (20 cm).png|Lighter young. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Astropyga radiata」の詳細全文を読む スポンサード リンク
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