The Box Jellyfish, also known as the Irukandji (9 letters), is a species of jellyfish found in the coastal waters of Australia and other parts of the Indo-Pacific region. It is one of the most venomous creatures in the world and can cause severe pain, paralysis, and even death. Its sting is so powerful that it can be fatal to humans within minutes. The Box Jellyfish has a cube-shaped bell and four distinct tentacles, which can reach up to three feet in length. It is usually transparent or pale blue in color and can be found in shallow waters near the shore.