This video says about itself:
Arnoux’s Beaked Whales performing in the Hauraki Gulf New Zealand 28/01/2012, Tiritiri Matangi Island in the distance.
From Underwater Times:
Expedition Films Rare Arnoux’s Beaked Whale Pod; Scars Draw Attention of Scientists
Underwatertimes.com News Service
Dresden, Germany (Dec 22, 2006 13:54 EST) On the 17th of December, Meike Scheidat & Linn Lehnert, the whale watchers on board of Polarstern, made a remarkable cetaceans sighting: Four Arnoux’s Beaked Whales (Berardius arnuxii), observed from the helicopter.
The Arnoux’s Beaked Whales is one of the least known species of the Beaked Whales family (Ziphidae), itself poorly known in general.
Arnoux’s is one of the biggest species amongst beaked whales.
The ones observed were probably 9 metre long.
These deep-sea feeding whales are particularly sensitive to underwater acoustic disturbances.
The pictures showed a whole array of scars on their skin, which are already under investigation.
Other scars could be caused by cookie-cutter sharks, which would imply big migration between the subtropical waters where these sharks are found and the ice-edge (64°06 S) where they were observed.
See also here.
Right whale species here.
Why do narwhals have tusks? Here.
Melon-headed whales: here.
Whales and whale lice species: here.
Parasitic Cookiecutter sharks seem to prefer biting chunks from Swordfish as opposed to other species: here.