Where are jellyfish found?

Throughout the Coral Sea from estuaries and river mouths to the open ocean.

What is the most dangerous jellyfish?

Chironex fleckeri, a large box jellyfish, is considered the most venomous marine animal. The stinging organelles on its tentacles penetrate the skin and release venom. A sting will cause intense pain immediately and, depending on the size of the jellyfish and the part of the body it stings, can cause cardiac arrest and even death, all within a few minutes of being stung.

What is Irukanji Syndrome?

Irukanji Syndrome is caused by a sting from a group of smaller jellyfish called cubozoans. It also packs a punch with severe pain, muscle cramping, hypertension and cardiac complications. However, these symptoms are not immediate and begin five to 45 minutes after being stung.

What’s with the name?

While jellyfish look jelly-like, they’re not fish. They’re made up of about 95 per cent water and have no backbone, blood or heart. Their nervous system helps them to respond to their surroundings.

Do they have eyes?

Jellyfish have a vast range of visual systems. When it comes to eyes, box jellyfish have 24! They are grouped in six lots of four, spread across all sides of their bell, and they look inwards. These jellyfish use their body as a lens to see through, which gives them 360-degree vision.

What do they eat?

Most feed on plankton and they feed continuously throughout the day.

Do they have predators?

There are a wide range of predators from fish and crustaceans to sea turtles. Turtles are often affected by stings, especially across the eyes.

When is ‘stinger season’?

Our typical season is November to May but warmer sea temperatures, caused by climate change, are extending the season.

How do you identify a box jellyfish?

Box jellies are distinguishable by their cube shape and their ability to propel themselves at almost four knots.

What is the best way to protect yourself from jellyfish?

Wear protective clothing (eg. stinger suits) even if you are swimming inside a netted swimming enclosure.