英语听力：自然百科 大堡礁：自然奇迹—22
时间：2014-10-29 07:21:41
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（单词翻译）
The snail1 appears to release chemicals that paralyse its victim.
The goatfish seems powerless to escape as it's swallowed alive.
Moments later, a venomous
barb2 inside the snail puts the fish out of its
misery3.
In a place where even seashells are deadly, remaining undetected is essential if you want to survive the night.
And simply hiding is not enough. Just a hint of your
scent4 wafting5 into the current can attract trouble.
The parrotfish has come up with an elegant solution in a form of a sleeping bag made out of
membrane6.
It stops the smell spreading along the reef and being picked up.
It's a very good way if you're a parrotfish of ensuring you get a good night's sleep.
No one has ever filmed a parrotfish making its
cocoon7 before.
It then draws water into its mouth and pushes it out of its gills, blowing up the mucous bubble around it.
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