Box jellyfish is the type of Jellyfish that is famous for its poisonous venom and fatal stings. They are cnidarian invertebrates identified by their cube-shaped medusae and due to this cube shape they are called Box Jellyfish. The species of Box Jellyfish with extremely potent venom inlcudes Chironex fleckeri, Carukia barnesi and Malo kingi. Their Stings are very painful and can cause death.
They are also known as the Marine Stinger and Sea Wasp. People usually avoid beaches or waters where they are present.