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The shallows are only a tiny part of the marine world.
浅水区仅占海洋世界的一小部
90% of it is open water.
其中九成都是大海
Its currents carry life for thousands of miles.
海流带着生物走过数千公里
The masters of this nomadic existence are jellyfish.
水母正是这种流浪生活的大师
A life spent drifting in the empty ocean could be a lonely one...
漂流在空荡海洋的生活很寂寞
but not for this jellyfish.
但这种水母例外
Aurelia.
这是海月水母
Swarms like this are not accidental.
它们聚集成群并非意外
These individuals all hatched together
水温和水流都恰好时
when the temperature and currents were just right.
这些水母会一起孵化
Their timing has ensured that they can make the most
这个时机能确保它们 得以饱餐一顿，赶上浮游生物
of feeding on a late-summer plankton bloom.
在夏季最后一次大量出现
