回游 (huí yóu) — migration (of fish)

Definition

Examples

• 每年秋天，这些鱼都会回游到上游产卵。
  Měi nián qiū tiān, zhè xiē yú dōu huì huí yóu dào shàng yóu chǎn luǎn.
  Every autumn, these fish migrate upstream to spawn.
• 科学家研究了鲑鱼的回游路径。
  Kē xué jiā yán jiū le guī yú de huí yóu lù jìng.
  Scientists have studied the migration routes of salmon.
• 这条河流的回游现象已经持续了几百年。
  Zhè tiáo hé liú de huí yóu xiàn xiàng yǐ jīng chí xù le jǐ bǎi nián.
  The migration phenomenon on this river has persisted for hundreds of years.