Box Jellyfish
Australia

An excellent professional video on the most venemous creature on the planet, the Box Jellyfish. Ocean's Deadliest was uploaded to YouTube February 2009 and stars the late great Steve Irwin, Philippe Cousteau and Dr Jamie Seymour, senior lecturer at the James Cook University in Queensland.

Box Jellyfish Avoidance Information | Australia Pictures | Australia Guide

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The lack of a brain in your average jellyfish means that if stings you it really can't help it - unless it's Chironex Fleckeri (Box Jelly) which can control itself efficiently since it has four brains and multiple eyes.
When Jellies' stinging cells (nematocysts) make contact with your skin they...more