A marine animal belonging to the Echinodermata phylum, Echinoidea class, and Echinidae family. This purple sea urchin is the most common sea urchin found along the coasts of Hokkaido and northern Honshu. Its shell is 6-7 cm in diameter, and its spines are about 2-3 cm long. It is very similar to the purple sea urchin of the Echinoidea family found further south, but can be distinguished by its dark green spines and rows of microscopic notches on the surface, its green or purple bare shell, and its lack of habit of going into holes in rocks. It crawls on rocks and boulders, feeding on seaweed, fragments of living organisms, and decaying matter. It spawns from September to late October. It is an important edible species, with several hundred tons of gonads landed annually. It is also found along the coasts of the Korean Peninsula and northern China. [Michio Shigei] ©Shogakukan "> Northern purple sea urchin Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
棘皮(きょくひ)動物門ウニ綱オオバフンウニ科に属する海産動物。北海道と本州北部の沿岸でもっとも普通にみられる紫色のウニ。殻の直径6~7センチメートル、棘(とげ)の長さ2~3センチメートルぐらい。本種より南方に分布するナガウニ科のムラサキウニに酷似するが、棘がやや暗緑色を帯びて、表面に顕微鏡的な刻み目の列があること、裸殻が緑色、または紫色であること、岩の穴の中へ入る習性がないことなどによって区別できる。岩礁、玉石などの上をはい、海藻、生物体の破片、腐食物などを摂食する。産卵期は9~10月下旬まで。食用種として重要で、1年間に数百トンの生殖巣が水揚げされる。朝鮮半島と中国北部沿岸にも分布する。 [重井陸夫] ©Shogakukan"> キタムラサキウニ 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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