Blainville's beaked whales 布氏中喙鯨(布蘭氏喙鯨)

BBC Nature - Blainville's beaked whales enter stealth mode
http://www.bbc.co.uk/nature/14254582
Blainville's beaked whale - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Blainville's_beaked_whale