Chironex Fleckeri: "Sea Wasp"

Chironex Fleckeri
Chironex Fleckeri


Chironex fleckeri is the largest species of box jellyfish. They are pale blue and transparent, so they are almost invisible in the water. They can have bells around 1 foot in diameter and four clusters of 15 tentacles at the four corners of its bell. These tentacles can extend around 15 ft and they contract to around 15 centimeters when it is swimming. Chironex fleckeri can swim at a fast rate of 5 feet per second. They are carnivores that hunt prawns and small fish by day. Their predators are turtles, who have tough skin that their stingers cannot penetrate. These jellyfish are infamous for their deadly stings that are able to kill a human in only 3 minutes. They are found in waters in northern Australia.

Chironex fleckeri are one of the most venomous creatures in the world
Chironex fleckeri are one of the most venomous creatures in the world


Chironex fleckeri is one of the most venomous creatures on the planet. The amount of venom in one animal is enough to kill 60 adults. The stings are very painful and attack the nervous system, heart, and skin. Most victims die of a heart attack several minutes after contact. Swimmers usually do not have enough time to make it back to shore or boat after they are stung. A human can die in as little as 3 minutes. Combined with its 15 foot long tentacles, rapid rate of movement, and near invisibility in water, Chironex fleckeri is one of the deadliest organisms in the world. There is an anti-venom available, but by the time it reaches the victim, they have already died.

"The Sea Wasp"
"The Sea Wasp"


Kingdom: Animalia
Phylum: Cnidaria
Class: Cubozoa
Order: Chirodropida
Family: Chirodropidae
Genus: Chironex
Species: C. Fleckeri

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