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The lion's mane jellyfish was nearly 5 feet across and was seen floating near shore. They're among the largest known species.

Jeremy heads out on a boat with Dr Jamie Seymour to try and catch the world's most venomous animal- the Box Jellyfish.

A sea nettle is the size of a grain of rice when its born. Find out what else makes this jellyfish so freaky in this episode of “Freaky ...