Catching food in the perpetual darkness is not easy. 在永恒的黑暗中捕捉食物十分困难
so it is extremely difficult to find in the gloom. 因此它很难在黑暗中被发现
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
As you descend, the sunlight rapidly fades. 随着越潜越深 阳光会迅速减弱
200m down, you enter the twilight zone... 200米深处 是一片黄昏世界
The least known parts of it are its great depths. 这之中最不为人知的区域是海洋深处
With the orca gone, the rays can resume their courtship... 虎鲸离开后 蝠鲼群得以继续它们的求偶行为
This family are the only orca known to hunt rays like this... 这一家子是已知的虎鲸群中 唯一用这种方式捕猎蝠鲼的
..only to be forced back up again by the experienced female. 却被经验丰富的雌虎鲸逼回海面
And now, with the exhausted rays trapped against the surface, 精疲力竭的蝠鲼无路可逃