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Malacosteus niger
The northern stoplight loosejaw (''Malacosteus niger'') is a species of barbeled dragonfish. The postorbital photophore in this species is larger than in ''M. australis''. It also differs in lateral photophore count, as well as in morphological characters. The maximum known length is 25.6 cm (10.1 in). Its specific epithet ''niger'' is Latin for "black".
''M. niger'' occurs in the mesopelagic zone of all oceans. Contrary to barbeled dragonfishes in general, it is not a vertical migrator. While the morphology of ''M. niger'' with huge fangs and an enormous gape (as it common names testifies) is typical for its family and suggests adaptations to piscivory, its diet in fact contains a substantial proportion of zooplankton. It is suggested that its dominant feeding mode is searching for zooplanktonic prey (copepods in particular) using bioluminescence to illuminate a small search area, with infrequent encounters with larger prey items. The likely origin of the pigment necessary for detecting its long wavelength bioluminescence are copepods themselves.〔
==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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