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Pagurus bernhardus
''Pagurus bernhardus'' is the common marine hermit crab of Europe's Atlantic coasts. It is sometimes referred to as the common hermit crab or soldier crab. Its carapace reaches long, and is found in both rocky and sandy areas, from the Arctic waters of Iceland, Svalbard and Russia as far south as southern Portugal, but its range does not extend as far as the Mediterranean Sea. It can be found in pools on the upper shore and at the mean tide level down to a depth of approximately , with smaller specimens generally found in rock pools around the middle shore and lower shore regions, with larger individuals at depth. ''P. bernhardus'' is an omnivorous detritivore that opportunistically scavenges for carrion, and which can also filter feed when necessary.
''Pagurus bernhardus'' uses shells of a number of gastropod species for protection, including ''Littorina littorea'', ''Littorina obtusata'', ''Nassarius reticulatus'', ''Gibbula umbilicalis'', ''Nucella lapillus'' and ''Buccinum''.〔(【引用サイトリンク】publisher=ARKive )〕 In the warmer parts of its range, the sea anemone ''Calliactis parasitica'' is often found growing on the shell occupied by ''Pagurus bernhardus''. In colder waters, this rôle is filled by ''Hormathia digitata''. Hermit crabs fight one another for gastropod shells and have a preference for shells of certain species.〔
==References==
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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