Contents
Cassius: The World’s Largest Croc at Australia Zoo
Australia Zoo on the Sunshine Coast in Queensland is home to many amazing animals, and one of the most famous is Cassius, the saltwater crocodile. Cassius is one of the most deadly animals in the zoo, the largest crocodile in captivity, and one of the strongest. He represents the wildlife conservation efforts of the Irwin family and their mission to protect native wildlife. If you want to see crocodiles in their natural habitat, a crocodile cruise in Darwin is the ultimate experience. You can see these incredible reptiles up close as they glide through the waterways of the Northern Territory.
Meet the Famous Crocodile

Australia Zoo was founded by the late Steve Irwin, also known as the Crocodile Hunter. A wildlife warrior and conservationist, Steve dedicated his life to protecting Australian animals and other endangered species. His legacy lives on through his wife, Terri Irwin, and their children, Bindi Sue Irwin and Robert Clarence Irwin. They run this interactive conservation destination and educate the public about wildlife action and animals worldwide. One of the most famous animals at the zoo is Cassius the saltwater crocodile, he is a symbol of the Irwin family’s mission.
Cassius: The Croc

Cassius, the saltwater crocodile, is a superstar at Australia Zoo. He is over 5.5 meters (18 feet) long and over a tonne in weight. Born in the wild in Cape York, Queensland, he was brought to the zoo in 1987 and has since become a symbol of wildlife conservation. He holds the Guinness World Record for the largest crocodile in captivity and is one of the deadliest animals in the zoo due to his size and strength. Although Cassius is not the largest crocodile ever recorded in the wild, he is still a big attraction. He is estimated to be over 110 years old, which is well beyond the average lifespan of a wild crocodile, which is 70-100 years. His size and longevity are a testament to the strength and endurance of an adult saltwater crocodile.
Why He’s a Global Icon

Cassius’s fame goes beyond his size. He was one of Steve Irwin’s favourite animals and helped the late Crocodile Hunter to highlight the importance of crocodile conservation. Steve’s wildlife conservation was showcased in many wildlife documentaries, and Cassius was in many of them. The Crocodile Environmental Park was a key part of the Irwin family’s wildlife photography and animal care. Terri Irwin and their children Bindi Sue Irwin and Robert Clarence Irwin, who are now also involved in the family’s wildlife conservation, continue to follow Steve’s dream. They are working to conserve crocodile conservation and also sustainable practices through Australia Zoo Wildlife Hospital, which is one of the busiest wildlife hospitals in the world.
Visitor Expectations

At Australia Zoo, you can have animal encounters with many species, but Cassius is one of the main attractions. Visitors can see him up close in his natural habitat within the park, where he has plenty of room to move. The zoo also offers interactive animal experiences where you can get up close and personal with many Aussie animals, including koalas, kangaroos and tigers, with our expert animal handlers. Cassius is featured in the world-famous Crocoseum, where you can see many reptiles, including crocodiles, in action. The Australia Zoo Croc Research Team conducts research on crocodile behaviour, breeding and conservation. The zoo also provides a platform to educate people on crocodile conservation and what we can do to protect these crazy crocodiles in the wild.
The Steve Irwin Legacy
Steve Irwin’s legacy lives on at the zoo. His passion for wildlife conservation continues through Wildlife Warriors, the non-profit organisation he founded to protect animals around the world. The family’s ongoing work to raise awareness for wildlife protection and animal rights is part of the Australia Zoo mission. The zoo goes beyond crocodiles with a focus on Australian wildlife and global conservation. You can learn about wildlife action and support conservation projects, all while enjoying the animal interactions.
Conclusion
Cassius the saltwater crocodile is one of the most famous animals at Australia Zoo, standing as a symbol of the Irwin family’s commitment to animal conservation.
FAQ
How big is Cassius?
Cassius is over 5.5 meters (18 feet) long and weighs more than a tonne.
Where is Cassius from?
Cassius was born in Cape York, Queensland and brought to the zoo in 1987.
How old is Cassius?
Cassius is over 110 years old.
Can I interact with Cassius?
While you can see Cassius up close during zoo shows, you can’t interact with him directly due to his size and temperament.
What else can I see at Australia Zoo?
Apart from Cassius you can see many other Aussie animals including koalas, tigers and elephants all part of the zoo’s conservation.