The set of the crocodile den in the film was set up in a warehouse in the Maidstone district of Melbourne. Some shots on the "mud island" were taken on an artificial lake in the suburbs of Victoria. The art department and the art team are here. His main job is to make this place look as similar as possible to the Northern Territory.
The director filmed five weeks of night scenes on the artificial island based on the script. In fact, the plan is to shoot indoors, because the surrounding environmental factors are better controlled. However, due to various reasons, the crew finally had to build an artificial island on a lake in Victoria. Weather factors and overtime work have brought some pain to the employees who filmed at night. All the actors are very dedicated. Every night they were soaking in the water to take pictures. Although there were black and slippery eels in the water, they stayed there for a long time, and people were used to the eels digging past their fingers. In the end, there are eels under the framework of the building
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In order to make the picture of the crocodile realistic, the film made a giant crocodile measuring 10 meters in length and 1.4 meters in width according to the ratio of the real crocodile. The giant crocodile is made of rubber, metal and some special materials, and the weight is up to 500 kilograms. In addition, the crew specially built a 60-meter×40-meter crocodile nest in a temporary studio in Melbourne. The production cost of the crocodile model is about 50,000 US dollars
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