Australian Parrotfishes not only have two animals in their name, but also build a sleeping bag out of mucus around them to sleep undisturbed!
Know more:
http://blogs.discovermagazine.com/notrocketscience/2010/11/17/parrotfish-sleep-in-a-mosquito-net-made-of-mucus/#.UoHckHBHI7x Source
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