Cassius (crocodile)

Cassius is a male saltwater crocodile (Crocodylus porosus) who was previously recognised by the Guinness World Records as the world's largest crocodile living in captivity in 2011. The animal measures 5.48 m in length, weighs approximately 1300 kg, and is kept at the Marineland Crocodile Park, a zoo on Green Island, Queensland, Australia.

Cassius was officially recognized by Guinness in 2011, but lost the title in 2012 to Lolong, a 6.17 m saltwater crocodile caught in the southern Philippines. Cassius again holds the record since Lolong's death in February 2013.

Crocodile researcher Professor Graeme Webb said that Cassius was "a big old gnarly crocodile" aged between 30 and 80 years old when he was captured in 1984, and was "maybe 120 years" in 2023.

Capture
Cassius was known as a problem animal which attacked boats in the Northern Territory's Finniss River and was captured in 1984. Three years later, he was brought to Green Island by crocodile hunter George Craig, who had opened Marineland Melanesia in 1969. At the time of his introduction at the zoo, Cassius measured 5.30 m.