Unlike most jellyfish, which have stingers only on their tentacles, the Irukandji also has stingers on its bell. Biologists have yet to discover the purpose of this unique characteristic. The hypothesis is that the feature enables the jellyfish to be more likely to catch its prey of small fish.
Irukandji jellyfish have the ability to fire stingers from the tips of their tentacles and inject venom.
Irukandji jellyfish’s stings are so severe they can cause fatal brain haemorrhages and on average send 50-100 people to the hospital annually.
It is capable of delivering a sting 100 times as potent as that of a cobra and 1,000 times stronger than a tarantula.