What is the deadliest aquatic animal in the world?

Answer 1

There are two contenders for this title. One has the most potent venom, but another species has been responsible for more deaths because it can kill within five minutes of contact.

The Irukandji is a very small type of box jellyfish, found in Australian waters and those of the South Pacific, especially around Papua New Guinea and southeast Asia. It delivers a powerful venom said to be 100 times as potent as that of a cobra and 1,000 times as strong as that of a tarantula. Its venom can result in life‑threatening hypertension and pulmonary oedema. Two deaths have been reported in Australia.

Running a close second is the Australian sea wasp, or Box jellyfish (Chironex fleckeri). There are about twenty species of box jellyfish, and they are all highly venomous, but the Australian sea wasp has a potent venom that causes agonising pain, and is toxic to nerve, muscle and heart tissue. Death can occur within minutes. In Australia, this jellyfish has been responsible for 64 known deaths since 1883.

Put simply: the irukandji is deadlier, but the Chironex fleckeri kills more quickly. The Irukandji Jellyfish is the most dangerous jellyfish in the world. After being shocked, the victim will get Irukandji syndrome symptoms are nausea vomiting, high blood pressure, cramps, severe pain, or even death.

Answer 2

a box jellyfish called "chironex fleckeri". It lives off the coast of Australia and Thailand and kills about 20-50 people a year from its deadly sting.

Answer 3

The flower sea urchin is considered to be one of the deadliest in the world. These urchins are found in oceans throughout the world.