Japan's whaling fleet returned on Thursday from its Antarctic hunt after a year-long suspension with a take of more than 300 whales, including pregnant females.
As the focus of the 2013 documentary Blackfish, Tilikum - affectionately called "Tili" - has been at once regarded as a victim of captivity and a maker of tragedy. Now it's been announced that the tale of Tili may be coming to a slow and quiet end.
A PhD student is collecting whale "blow" to understand population increases.
A sixth sperm whale has died on a British beach, the latest of nearly 30 to have become stranded in shallow waters of the North Sea over the past month.
After two beluga deaths at SeaWorld, San Antonio, questions are being raised after death of an orca on Monday.
Australia is considering dragging Japan back to the international court in an attempt to halt whaling.
Britain has taken a stand beside Australia against renewed Japanese whaling, as it sends a naval fisheries patrol to the Antarctic.
The Turnbull government appears to have been caught out by Japan's whalers - pinning hopes on diplomacy to halt them, just as the fleet's departure for the Antarctic was announced.
Japan has finally confirmed it will commence whaling in the Antarctic this summer, despite the weight of court decisions and scientific opinion against it.
Japan's whalers have been fined $1 million over their hunt in the Australian Antarctic whale sanctuary, on the eve of ministerial talks between the two countries.
They grow up to 12 metres long and have a distinctive pattern, but until now scientists had never seen the elusive Omura's whale in the wild.
Japan has moved suddenly to fence itself off from any future challenge to its Antarctic whaling in the International Court of Justice.
A young humpback whale has swum off into the sunset with its mother after being freed from a web of nylon rope off the NSW south coast.
Whale calf entangled in fishing net off Narooma free
Rescuers could attach floating buoys to a humpback whale calf trapped in a fishing net to prevent it diving.
A legal case is being revived against Japanese whaling in Australian Antarctic waters, with a claim the whalers stand in contempt of the Federal Court.
Earlybird whale watchers in Eden have been rewarded with astounding acrobatic displays in the bay.
He's one of Australia's most deeply experienced, best credentialled diplomats – and he has just weeks to try to persuade Japan not go to whaling in the Antarctic again.
Learning the local slang can be a challenge for humans when fitting into a new neighbourhood, but it seems the same can be said for sperm whales.
Science has been cemented at the top of national polar work, with the choice of the Australian Antarctic Division's internationally recognised Chief Scientist, Nick Gales, as its new Director.
Bloodied and writhing in pain, an Australian actor stars in a graphic video calling for an end to global whaling.
Australia's humpback populations are rapidly recovering from the damage caused by whaling and could soon be delisted as a threatened species, scientists say.
A pod of more than 30 dolphins has put on a spectacular show, herding fish and frolicking with swimmers at Coogee on Monday morning.
[WARNING: GRAPHIC] Comedian Ricky Gervais has denounced online the slaughter of pilot whales on the Faroe Islands near Norway.
Icelanders appear to be coming round to the view that upholding their nation's reputation is more lucrative than sales of whale meat.
Animal rights groups seeking the release of Lolita, a killer whale in captivity since 1970, have sued the Miami Seaquarium saying her conditions violate the Endangered Species Act.
Humpback whales are making a comeback, a New Zealand survey shows.
Australia's best known whale, Migaloo, appears to have turned up again. But not where he usually does.
Incredible footage has emerged of a group of sharks feeding on the carcass of a sperm whale off the coast of Coffs Harbour.