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	[ Explanation.1 ] 。
	[ Bits of Knowledge.1 ] The legs of Sea Urchins have suckers, which able them to walk smoothly on glasses. Also, the legs stretches and can be moved around in any directions.
	[ Bits of Knowledge.2 ] Sea Urchins have mouth on the bottom of their body, and are always chewing something. They usually eat seaweed on top of rocks for the whole day. Also, they love to eat meats of fishes too.