The Irukandji jellyfish is one of the most venomous jellyfish in the world. It is very small, usually 5-10mm wide, but its venom is extremely powerful, 100 times more potent than a cobra's venom. Little is known about its life cycle due to its small and fragile nature. It is believed to reproduce similar to other jellyfish, starting as an egg that develops into a polyp then buds off ephyra that mature into adult jellyfish. Their sting can cause excruciating "Irukandji syndrome" within 30 minutes of the sting.

2. Very Little is known about the life cycle of the Irukandji Jellyfish. This is because they are too small and sufficiently fragile to require special handling and containment.

3. Two Species Kingdom: Animalia Phylum: Cnidaria Class: Cubozoa Order: C arybdei da Family: Tamo yidae Genu s: Malo Species: M. kingi Malo kingi Kingdom: Animalia Phylum: Cnidaria Class: Cubozoa Order: C arybdei da Family: Cary bdeidae Ge nus: Carukia Specie s: C. barne si Carukia barnesi Animalia: Taxonomic kingdom comprising all living or extinct animals. Cnidaria: Hydras; polyps; jellyfishes; sea anemones; corals. Cubozoa: Box Jellyfish, named for their cube-shaped medusae, are a class of invertebrates belonging to the class Cubozoa, as well as being the preferred common name for notoriously dangerous Chironex fleckeri. Carybdeida: A taxonomic family, within order Cubommedusae - the box jellyfish. Carybdeidae: A family of venomous box jellyfish within class Cubozoa.

6. Habitat Irukandji Jellyfish were at one time thought to be in the northern waters of Australia only. Since then, the species has been found in waters as far north as the British Isles, Japan, and the Florida coast of the USA.