pufferfish       
noun [ C ] uk/ˈpʌf.ə.fɪʃ/ us/ˈpʌf.ɚ.fɪʃ/  pufferfish
 河豚
a type of fish, usually found in warm or tropical seas, that can make itself larger by filling its stomach with water or air
  Fugu is a pufferfish that contains a deadly poison. 日本河豚是河豚的一种,含有致命毒素。