There are many creatures to be careful of in Australia, and one of them is the Box Jellyfish. Box Jellyfish can be found in coastal waters of Northern Australia. The main jellyfish season is from November to June. It is not safe to swim as the sting from a Box Jellyfish can result in injury. Popular swimming areas are protected by special nets that create a swimming enclosure. Outside of these areas, you enter the water at your own risk.