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Sabellaria alveolata
''Sabellaria alveolata'', (also known as the honeycomb worm), is a reef-forming polychaete. It is distributed around the Mediterranean Sea, and from the north Atlantic Ocean to south Morocco. It is also found in the British Isles at its northern limit in the northeast Atlantic. Its common name is derived from the honeycomb-like pattern it creates when building its tube reefs.
==Description==
''S. alveolata'' is an annelid (ringed worm) that lives in small tubes it constructs from cemented coarse sand and/or shell material, forming reefs.〔 The tubes are arranged in close proximity and have a distinctive honeycomb-like appearance. These reefs range from to 〔(Hermelles )〕 thick and take the form of hummocks, sheets or more massive formations.〔 Adult size ranges from .〔 The thorax has three pairs of flattened chaetal sheaths, its chaetes form an operculum which is used to seal the tube opening.〔 Depending on the local substrate, the colour of the tube varies.〔
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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