Crocodile trap - a big crocodile trap is set to catch a stray saltwater / esturaine crocodile in a river which had access to the sea during the wet season . Northern Territory, Australia . During the wet season the river flowing through this pool had access to the ocean; which is the reason why crocodiles were able to access this inland river system. To protect people the rangers are forced to catch those hugh reptiles; because they can seriously harm or kill humans.