A box jellyfish is the most venomous on the planet, containing toxins that attack the heart, nervous system, and skin cells. It is so venomous that it will kill you within 2 minutes if you receive tentacle contact.

If a tentacle touches your skin it will result in a very painful sting. Survivors can experience considerable pain for weeks and often have significant scarring where the tentacles made contact. Up to 15 tentacles grow from each corner of the bell and can reach 10 feet in length.

Each tentacle has about 5,000 stinging cells, which are triggered not by touch but by the presence of a chemical on the outer layer of its prey. Box jellyfish can live up to 1 year. They are pale blue and transparent in color and get heir name from the cube-like shape of their bell.

They have up to 24 eyes. Box jellyfish shrink if they don’t eat.

Source: Google

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