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Graceful grenadier
''Hymenogadus gracilis'', also known as the Graceful grenadier is a species of rattail. It is found at depths of in tropical and subtropical seas worldwide.〔Schwarzhans, W. (2014): Head and otolith morphology of the genera ''Hymenocephalus'', ''Hymenogadus'' and ''Spicomacrurus'' (Macrouridae), with the description of three new species. ''Zootaxa, 3888 (1): 1–73.'' 〕
This is one of the smallest of the rattails, growing to no more than in length. It is a slender fish with a large mouth, with rows of very small teeth, positioned in the underside of the skull. There is a short, thin chin barbel. It is more strikingly marked than most rattails, with bold black streaks on the head and black and silver barring over most of the body. There is a long bioluminescent organ with two lenses underneath the rear end of the body.
==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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