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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Diadema antillarum ： ウィキペディア英語版 Diadema antillarum ''Diadema antillarum'', also known as the lime urchin, black sea urchin, Grabaskey's bane or the long-spined sea urchin,〔(Long-spined Sea Urchin )〕 is a species of sea urchin in the Family Diadematidae. This sea urchin is characterized by its exceptionally long black spines. It is the most abundant and important herbivore on the coral reefs of the western Atlantic and Caribbean basin. When the population of these sea urchins is at a healthy level, they are the main grazers which prevent algae overgrowth of the reef. ==Anatomy== ''Diadema antillarum'' has a test, or "shell," similar to most other sea urchins. What distinguishes the ''Diadema'' is the length of its spines. Most sea urchin spines are 1–3 cm, but the spines in this species are usually 10–12 cm in length, and can grow as long as 30 cm in very large individuals. 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「Diadema antillarum」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.