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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 Porites astreoides ： ウィキペディア英語版 Porites astreoides ''Porites astreoides'' is a colonial species of stony coral in the family Poritidae. Its common name is the mustard hill coral or the yellow porites. It is a common species growing in shallow water on reefs in the western Atlantic and Caribbean Sea. ==Description== When it grows in fast-flowing, shallow water, ''Porites astreoides'' is encrusting but in calmer water at medium depths it is a massive coral with a smooth, mounded, semi-spherical form and can grow to in diameter. At greater depths it is usually plate-like and in caves and under overhangs the plates are angled to receive the maximum amount of light. It is the only species within the genus ''Porites'' not to have a finger-like form. The corallites are small and tightly-packed and give the coral a porous appearance. The polyps each have six tentacles and are generally retracted during the day. This coral is yellow, yellowish-green, pale grey or pale brown, a colour given to it by the dinoflagellate zooxanthellae, microscopic algae that live symbiotically within the coral's tissue. 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「Porites astreoides」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.