寬吻海豚
A bottlenose dolphin plays in a lagoon in Waimanalo, Hawaii. 一只寬吻海豚在夏威夷威瑪納諾的瀉湖里嬉戲。
While sleeping, the bottlenose dolphin shuts down only half of its brain. 睡覺時，寬吻海豚僅讓一半的大腦停止工作。
