Sometimes it is not size, strength, or ferocity that makes an animal dangerous, but its obscurity—allowing it to sneak past our senses until it is too late. While well-publicized warnings have long focused on deadly box jellyfish, another grave danger is presented to swimmers by the Irukandji—the “tiny killer.†Measuring only one cubic centimeter, this clear and nearly invisible creature floats aimlessly through the waves, trailing filaments up to two feet in length which carry venom one hundred times more potent than that of a cobra.
Swimmers who brush into the invisible creatures usually require hospitalization, and two deaths were recorded in Australia in 2002. The Irukandji has been found as far north as the UK—meaning that the invisible danger may be present almost everywhere. --
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