A marine animal belonging to the family Oleasteridae in the class Starfish of the phylum Echinodermata. A heavy, hard coral reef starfish with many large bump-like protrusions on its back. The bumps are cone-shaped with pointed ends, and there are usually about 40 of them. The arms are over 15 centimeters long. The base color is gray-brown, clay, orange, red, etc., and the bumps are black, reddish brown, dark brown, etc. It is found in the coral reef areas south of the Ryukyu Islands, in the Indian Ocean, and the western Pacific Ocean. It has an imposing, heavy appearance and stands up well to preservation, so it is often made into dried specimens and used as ornaments. [Michio Shigei] © Underwater Fort Enterprise Isamu Soyama "> Knob starfish (ecology) Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
棘皮(きょくひ)動物門ヒトデ綱オレアステル科に属する海産動物。背面に大きなこぶ状突起がたくさんある、重くて硬いサンゴ礁産のヒトデ。こぶは円錐(えんすい)形で先がとがり、普通、40個ぐらいある。腕の長さは15センチメートル以上になる。地色は灰褐色、粘土色、橙(だいだい)色、赤色などで、こぶは黒色、赤褐色、暗褐色などを帯びる。南西諸島以南、インド洋、西太平洋のサンゴ礁海域に分布する。見かけが堂々として重量感があり、よく保存に耐えるので、乾燥標本にして飾り物にされる。 [重井陸夫] ©水中フォート・エンタープライズ 楚山いさむ"> コブヒトデ(生態) 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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