单词：diadromous 

形容词

• 
  [1.a.diadromous] (同义词:[diadromous( adj. [植]有扇状叶脉的 )]  )
• 
  注释列句：(used of fish) migratory between fresh and salt waters
• 反义词 -> [anadromous( adj. (海鱼)溯河产卵的 )]  [catadromous( adj. 为产卵顺流而下的 )]