One of the most deadly aquatic animals includes the Iracongi jellyfish, which is also frequently known as the Irukandji jellyfish (the terms will be used interchangeably throughout the article). The scientific name of this species is Carukia barnesi and is found near Australia. Some people believe that this jellyfish is one of the most venomous of all creatures throughout the entire world. This jellyfish has become a bit more known over the last six years due to fatal human encounters. Throughout the article we will explore all you need to know about the Iracongi jellyfish including its life-threatening sting.