dark sleeper
(formerly, in large houses) A male domestic servant, of lowest status, whose job is to wash dishes and do other menial chores.
Odontobutis obscura, a freshwater goby found in East Asia
(anatomy) Situated in front of the nares
plural of nestmate
その生物学者は村の近くの川で捕まえた淡水ハゼ（Odontobutis obscura）を注意深く調べた。
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