We just learned about the Immortal Jellyfish.
Another type of jellyfish is the Irukandji Jellyfish.
This is the smallest type of jelly, and also one of the most venomous ones in the world!
They can be as small as 0.2 inches, and as big as a little less than 1 inch.
Their tentacles can be as short as less than one inch, or as long as 3 feet.
If this type of jelly stings a person, after about 30 minutes they can have headaches, muscle pains, throwing up, or even a heart attack.
It can take a few hours to get better, or sometimes a day or even a few weeks!
Such a small jelly that pack such a dangerous sting can be scary to watch out for in the water.
These jellies mostly only live around Australia on the north side.
(from: wikipedia - irukandji jellyfish)
Irukandji Jellyfish - World's deadliest fishing - The Nature of Science
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