The Northern Australian Box Jellyfish is possibly the world’s most venomous animal. This species occurs throughout the tropical waters of the Indo-Pacific.

Venom is delivered by stinging cells, which occur primarily on the tentacles, but in some species may be present on the body as well.

A number of small box jellyfish have been found to cause ‘Irukandji Syndrome’ in their victims.

Jellyfish that cause Irukandji Syndrome have stinging cells on their bodies as well as on the tentacles.

Blue Bottle or Portuguese Man'O'War are bright blue and float on the top of the ocean with lots of trailing tentacles.

Cyanea is commonly known as the hair jelly, snotty, or lion’s mane.

A re-cap of the dangers posed by venomous stingers and how to treat stings.