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The opalfish, ''Hemerocoetes monopterygius'', is a duckbill of the genus ''Hemerocoetes'', found only around New Zealand, at depths of between 5 and 200 m. Their length is between 10 and 25 cm. ==References== * * * Tony Ayling & Geoffrey Cox, ''Collins Guide to the Sea Fishes of New Zealand'', (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8 * Wade Doak, ''A Photographic Guide to Sea Fishes of New Zealand'', (New Holland Publishers (NZ) Ltd, Auckland, New Zealand 2003) ISBN 1-877246-95-6 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「Opalfish」の詳細全文を読む スポンサード リンク
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