降こう流りゅう魚ぎょこうりゅうぎょMeanings1nouncatadromous fishrare termA rare technical term in biology for fish that migrate downstream to spawn, such as eels. Not used in everyday conversation.ウナギは降こう流りゅう魚ぎょの代だい表ひょう例れいである。Eels are a typical example of catadromous fish.
