A siphonophore - with a cloak of lethal stinging tentacles. 管水母 身披一层致命的刺触须

165. As you descend, the sunlight rapidly fades.
     随着越潜越深 阳光会迅速减弱
166. 200m down, you enter the twilight zone...
     200米深处 是一片黄昏世界
167. ..an alien world, inhabited by creatures beyond imagination.
     仿佛置身外星 超乎想象的生物生存于此
168. A siphonophore - with a cloak of lethal stinging tentacles.
     管水母 身披一层致命的刺触须
169. Siphonophores repeatedly clone themselves
     管水母反复地自我克隆
170. and so grow to immense lengths.
     不断生长 体长极长
171. This one measures 45m and is the longest animal ever recorded.
     这一只达到了45米 是有记录以来所有动物中最长的

来自《行星地球 第三季 第二集 Planet Earth S03E02 海洋》第 168 行