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Closer to the surface, corals have sunlight to help them grow.
靠近海面的珊瑚有光照助其生长
And thanks to the smallest trickle of nutrients,
仰赖营养物质的缓慢流动
a barren desert can bloom into an underwater oasis...
贫瘠的海底荒漠也得以发展为一片绿洲
supporting a greater variety of life than any other ocean habitat.
生活在此的生物种类比其他海洋栖息地更为多样
These coral reefs are a magnet for green turtles,
这些珊瑚礁对绿海龟来说充满了吸引力
offering a service not available in the open ocean - a good clean-up by a shoal of tangs.
在这里它们能享受到远洋海域所没有的服务--刺尾鲷群提供的身体清洁
This work-over is far from cosmetic.
这项服务绝不是为了美容而已
As well as removing parasites, the cleaning stops the build-up of algae, so the turtle can swim freely.
鱼群清洁不仅能去除寄生虫，还能够防止海藻的堆积，海龟才能畅游大海。
But it's also got to feel good!
但这一定也很舒服。
