American shad       
noun [ C or U ] uk/əˌmer.ɪ.kən ˈʃæd/ us/əˌmer.ɪ.kən ˈʃæd/  American shad
 美国鲥鱼
a thin silver-coloured American fish that lives in the sea but swims up rivers to produce its eggs and has flesh that can be eaten as a food
  The number of American shad left in the bay has been steadily falling. 留在海湾中的美洲鲥鱼数量一直在稳步下降。 
 The state is trying to reintroduce the American shad to its rivers. 该州正试图将美洲鲥鱼重新引入河流。 
 See also: shad
 - More examples
 - American shad swim upstream to reach their spawning grounds.
 - This river used to be full of American shad.
 - The state has banned fishermen from catching American shad in the bay.