World’s largest captive crocodile dies at over 110

Cassius, the 5.48-meter (18-foot) saltwater crocodile known as the world’s largest in captivity, has died at an estimated age of over 110 years, as reported by Marineland Melanesia Crocodile Habitat in Australia.

Weighing over a ton, Cassius had lived at the sanctuary on Green Island, near Cairns in Queensland, since 1987.

The sanctuary shared on Facebook that Cassius’s health had been in decline since October 15, attributing his passing to his advanced age.

“He was very old and believed to be living beyond the years of a wild croc,” the sanctuary wrote in a heartfelt tribute. “Cassius will be deeply missed, but our love and memories of him will remain in our hearts forever.”

Cassius earned his Guinness World Record title as the world’s largest captive crocodile following the 2013 death of Lolong, a 6.17-meter (20 ft 3 in) crocodile from the Philippines.

Cassius is a 𝐛𝐢𝐠𝐠𝐠𝐠𝐠𝐠 boy but has some dreamy eyes 🥰️

He's the world's largest crocodile in captivity at nearly five and a half metres long 🐊 pic.twitter.com/tDk4bjAqob

— Guinness World Records (@GWR) August 11, 2023

Crocodiles are a central part of tourism in the Northern Territory, where Cassius originally lived before being transported to Marineland Melanesia due to his aggression toward other crocodiles in the area.

Since arriving on Green Island, Cassius became a well-known resident and a major attraction, drawing tourists fascinated by his massive size and storied history.

His presence brought awareness to the ancient species and contributed to education about crocodile conservation and safety.

The sanctuary expressed gratitude for the opportunity to care for him over the decades, reflecting that his memory will continue to inspire respect and awe for Australia’s native wildlife.