Australian box jellyfish

The Australian box jellyfish, scientifically known as Chironex fleckeri, is considered the world's most venomous jellyfish. It belongs to the class Cubozoa, which comprises about 50 species, many of which are venomous. These invertebrates are characterized by their box-shaped bell and tentacles that deliver potent venom through specialized cells called nematocysts.12

The venom of the Australian box jellyfish can cause severe pain, paralysis, cardiac arrest, and even death within minutes of a sting. While over 70 deaths have been officially recorded in the last century, the actual number may be higher. These jellyfish are strong swimmers, capable of hunting prey and navigating using their 24 eyes. They primarily feed on fish, worms, and crustaceans, and are preyed upon by sharks and sea turtles.12