Current Record Holder for Largest Saltwater Crocodile in Australia
The largest confirmed saltwater crocodile in Australia is a male named Cassius, a well-documented specimen measured by wildlife authorities and cited in official records and zoological databases. His length and weight consistently place him at the top of verified Australian crocodile records, with his size exceeding typical adult males in the region and drawing ongoing attention from researchers and conservation bodies.
Official measurements and monitoring data are maintained by state wildlife agencies and updated through periodic surveys, with Cassius often referenced in peer-reviewed studies and government biodiversity reports as the benchmark for large saltwater crocodiles in Australia. His case is also highlighted by wildlife organizations and media outlets that track exceptional specimens, and further details on large crocodilian records can be found on the Smithsonian National Museum of Natural History website Smithsonian National Museum of Natural History.
Size, Weight, and Physical Characteristics of the Largest Specimens
Adult male saltwater crocodiles in Australia typically range from 4.5 to 6 meters in length, but exceptional individuals like Cassius surpass these averages, with verified measurements showing lengths above 5.5 meters and body masses exceeding 600 kilograms. These dimensions are recorded using standardized field protocols, including laser-based length estimation and calibrated scales when animals are captured or measured in controlled conditions.
Size comparisons are often benchmarked against global records, with Australian specimens ranked among the largest living reptiles. Data from long-term monitoring programs and museum collections show that the largest saltwater crocodile in Australia is comparable in size to top individuals documented in Papua New Guinea and Southeast Asia, and comparative analysis is supported by the Australian Museum Australian Museum.
Habitat, Location, and Conservation Status of Large Crocodiles
The largest saltwater crocodile in Australia is found in northern Queensland, primarily in brackish estuaries, river mouths, and coastal wetlands where prey density is high and human disturbance is managed. These habitats support high crocodile densities, and protected areas such as national parks and Indigenous-managed lands provide critical refuge for breeding populations and long-lived individuals.
Conservation efforts are coordinated by state and federal agencies, with strict protections under Australian wildlife law ensuring that large specimens are monitored rather than removed. Population surveys, satellite tracking, and public education programs help reduce conflict, and detailed policy and management frameworks are published by the Queensland Government Department of Agriculture and Fisheries Queensland Government Department of Agriculture and Fisheries.