Dramatic video shows orca pod hunting and killing the grey whale and calf.

5 transient Killer Whales attack and kill a Gray whale from start to finish. / Monterey Bay Whale Watch/gowhales.com

Whale song recordings aid recovery of rare ocean giant.

Scientists make crucial discoveries about a NZ whale species nearly driven to extinction.

A pod of orcas stunned onlookers in Devonport today.

Scientists are gaining world-first insights into the lives of Antarctica's whales.

Japan will inform the IWC of its decision by the end of the year.

At last report yesterday the six survivors were about 400m offshore and heading north.

Ngāi Tahu planning various cultural protocols, including a rāhui for people's own safety.

Whale stranding at Baylys Beach near Dargaville.

Wellington's first Matariki fireworks hinge on whether the whale stays in the area.

Activists are calling on Japan to "put down the harpoons".

Passengers on board Auckland Whale & Dolphin Safari were in for a rare natural show on Tuesday when they discovered a whale carcass complete with feeding sharks floating north-east of Waiheke Island. / Footage supplied by AWADS.

A pair of some of the rarest whales delight tourists in an epic encounter.

Army personnel dig a trench to the sea in a bid to help rescue a stricken Orca on a Marlborough beach. Twitter / @NZarmy

An orca whale is stranded at Marfells Beach in Marlborough

Researchers from Cornell University and Oregan State University fear that seismic airguns in oil and gas drilling areas are negatively impacting whales, with repetitive sounds travelling thousands of kilometres and repeating for months on end. / Audio from Cornell University.

Beached whale's beak sawn off.

Survival rates fall from 70 per cent in the 1990s to 45 per cent now.

Golden Bay whales may have headed back to sea.

DoC staff were tonight monitoring a pod of about 200 pilot whales milling around in the sea off Golden Bay.

Volunteers are using two boats to guide the 17 pilot whales that were stranded at Golden Bay this morning to the rest of the their pod and try to coax them out to deeper waters.

People are being warned to stay off a beach where the carcasses of hundreds of whales are at risk of exploding.

Did recent seismic surveys in the area cause whales to beach themselves at Farewell Spit?

New Zealand 'disappointed' at Japan's latest whaling foray into the Southern Ocean.

Conservation group Sea Shepherd have photographed a Japanese whaling ship with a dead whale in protected waters.

The playful and curious orca entertained those on the boat for about 20 minutes.

A Coromandel harbourmaster has posted that he was stood down after saving an orca which got its tail caught in a cray pot last night.

Photographer's drone video captures local kayaker Tim Stewart swimming with orca off Army Bay

Stunned fishermen spotted a gigantic alien-like ball floating off the coast of Western Australia before it was devoured by hungry sharks.