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Manicina areolata
''Manicina areolata'', commonly known as rose coral, is a colonial species of stony coral in the family Mussidae. It occurs in shallow water in the West Atlantic Ocean and Caribbean Sea, sometimes as small solid heads and sometimes as unattached cone-shaped forms.
==Description==
''Manicina areolata'' has two entirely different growth forms. Some individuals form small, solid hemispherical heads while others are small, cone-shaped structures that are not attached to the seabed. The surface of the coral consists of long meandering walls with wide intervening valleys. The polyps sit in corallites (stony cups) in the valleys from which fine septa (transverse ridges) extend in several series up to the summit of the walls on either side. Often the whole coral consists of one long, convoluted valley, sometimes with side valleys. Where there is more than one valley, the intervening walls have grooves running along the top. The colour of this coral is yellowish-brown, tan or dark brown, often with the valleys and walls being contrasting colours. The polyps are only extended at night and their oral surfaces are often green.〔(【引用サイトリンク】title=''Manicina areolata'' (Linnaeus 1758) )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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