Half inch jellyfish that can take you out, quick

That little guy pictured on the right there can kill you dead, pronto.

Here is the post from Boing Boing, and here is the post they referenced at The Telegraph UK.

The jellyfish's sting can lead to "Irukandji syndrome," a set of symptoms that includes shooting pains in the muscles and chest, vomiting, restlessness and anxiety. Some symptoms can last for more than a week, and the syndrome can occasionally lead to a rapid rise in blood pressure and heart failure.

and

There is no antivenom, and people generally do not realize that they have been stung at first. The initial sting causes little pain, and it may be up to half an hour before a victim starts to feel the effects.

But those effects, Miss Gershwin says, can ultimately be disastrous, with some stings causing blood pressures to soar as high as 280 over 180.

Enjoy never meeting this organism in your whole life,

Bp

[via Boing Boing, photo Wiki Commons]