A gulper eel. 吞鳗

180. all traces of sunlight have disappeared.
     一缕阳光也无法照射进来
181. This is the midnight zone.
     一片午夜世界
182. Catching food in the perpetual darkness is not easy.
     在永恒的黑暗中捕捉食物十分困难
183. A gulper eel.
     吞鳗
184. Its giant, extendable mouth
     它巨大且可伸展的嘴部
185. can engulf prey larger than its own body.
     可以吞下比自身还大的猎物
186. Two miles down, you finally reach the ocean floor.
     再往下三公里 终于抵达了洋底

来自《行星地球 第三季 第二集 Planet Earth S03E02 海洋》第 183 行