noun
oarfish; king of herrings; ribbonfish
Refers specifically to the deep-sea fish Regalecus glesne, known for its long, ribbon-like body. The name comes from the Japanese legend of a messenger from the Dragon Palace (Ryūgū).
リュウグウノツカイは深海魚で、めったに姿を見せない。
The oarfish is a deep-sea fish and is rarely seen.
An oarfish had washed up on the shore.