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10 creatures that deliver the most painful stings and bites

By: Bryan Nelson on July 25, 2011, 10:40 a.m.
Box jellyfishBox jellyfish at the Port of Nagoya Public Aquarium in Japan

Photo: Guido Gautsch/Wikimedia Commons

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Box jellyfish

These gelatinous sea creatures, sometimes referred to as "stingers" in Australia, are among the most feared animals in the ocean. You might have a better chance of escaping a shark attack unscathed than surviving a swim through a box jellyfish's tentacles. The venom is so toxic that it is reputed to be the most venomous creature in the world. Adding to their nightmarish mystique, box jellyfish are nearly invisible to unsuspecting swimmers.