What is the most venomous marine animal?

They may not look dangerous, but the sting from a box jellyfish could be enough to send you to Davy Jones’s locker-a watery grave, that is. Box jellyfish, named for their body shape, have tentacles covered in biological booby traps known as nematocysts – tiny darts loaded with poison. People and animals unfortunate enough to be injected with this poison may experience paralysis, cardiac arrest, and even death, all within a few minutes of being stung. But don’t choose the mountains over the ocean just yet. Of the 50 or…

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