Lolita, an orca held captive for greater than half a century on the Miami Seaquarium, has died on the estimated age of 57 from suspected kidney illness.

Also often called Tokitae or Toki, she was believed to have been the world's second-oldest killer whale.

Her loss of life on Friday got here as her caregivers have been making preparations for her to return to the ocean within the close to future.

The Seaquarium posted an announcement saying the whale had "started exhibiting serious signs of discomfort" during the last two days, for which they mentioned she had been handled "immediately and aggressively".

They went on: "Despite receiving the best possible medical care, she passed away Friday afternoon from what is believed to be a renal condition."

Staff went on to name her "an inspiration" and a "beautiful spirit," highlighting the Lummi Nation (a Native American tribe primarily based in Washington state) who they mentioned "considered her family".

The theme park additionally shared a brief video on social media exhibiting her performing tips in her pool and interacting along with her keepers.

A life in captivity

Lolita had spent a long time performing for Miami crowds after being captured in the summertime of 1970, when she was round 4 years previous, throughout a interval of lethal orca roundups.

An orca believed to be her mom, Ocean Sun, who's now in her 90s, continues to swim free with different members of their clan within the waters between Washington state and Canada.

Animal rights activists have since spent years preventing to have Lolita - who weighs 5,000lbs (2,267kg) - free of captivity, the place she lived in a tank that was 80ft by 35ft (24 metres by 11 metres) and 20ft (6 metres) deep.

She retired from performing final spring as a situation of the park's new exhibitor's licence with the US Department of Agriculture and had not been publicly displayed since.

Earlier this 12 months the park's comparatively new proprietor, The Dolphin Company, and the non-profit Friends of Toki introduced a plan to maneuver her to a pure sea pen within the Pacific Northwest, with the monetary backing of Indianapolis Colts proprietor Jim Irsay.

'I'm heartbroken'

Responding to her loss of life, Mr Irsay mentioned: "I am heartbroken that Toki has left us.

"Her story captured my coronary heart, simply because it did tens of millions of others. I used to be honoured to be a part of the workforce working to return her to her indigenous residence, and I take solace in realizing that we considerably improved her dwelling circumstances this previous 12 months.

"Her spirit and grace have touched so many. Rest in peace, dear Toki."

President of The Dolphin Company, Eduardo Albor, wrote on social media: "Not a single effort we made to give Lolita an opportunity was a waste of time & money. My heart is truly broken.

"Lolita captured me since 1st day. Love at first sight. Thank you for making [me] imagine in what we do. The care workforce led by Mike Partica and Dr. Reiderson are true heroes."

Tony Hillaire, the chairman of the Lummi Nation - who've spent years working to safe Toki's launch and to return to her residence waters - mentioned: "The Lummi Nation is saddened by the news that our beloved Orca relative has passed away at the estimated age of 57 years old.

"Our hearts are with all these impacted by this news; our hearts are along with her household.

"We stand in solidarity with our Lummi members who poured their hearts and souls into bringing Sk'aliCh'elh-tenaut [Toki's name in the Lummi language] home."

In latest months, new upgrades had been put in to higher filter the orca's pool and regulate her water temperature.

Despite Lolita's freedom being in sight, there would have nonetheless been hurdles to beat, with federal and state regulators nonetheless needing to approve plans to maneuver her, which might have taken months or years.