Narwhals and Beluga

北極的寒水區是兩條有齒類鯨魚的家,牠們是narwhal, Monodon monoceros和beluga, or white whale, Delphinaplerus leucas.Narwhal或稱獨角鯨(sea-unicorn),可能就擁有整個動物世界中最獨特的牙齒.
 獨角鯨 Narwhals
 白鯨 Beluga
 Irrawaddy dolphin