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A lion's mane jellyfish gets its long and stingy tentacles tangled in the bubble engine, unintentionally flooding the Octopod and ...

Thinking about hitting the beach this weekend? Watch out for the giant jellyfish. WBZ-TV's Juli McDonald reports.

Scientists on a month-long deep-sea expedition off Argentina's coast documented a rare giant phantom jellyfish.

Today, Cash and his friends must build an UNDERWATER security base to protect themselves from a GIANT JELLYFISH!

As it floats on the surface of the ocean, the Man O' War looks beautiful and harmless but packs a killer sting with its deadly ...

Scientists spotted a rare phantom jellyfish (Stygiomedusa gigantea) during a comprehensive expedition in deep-sea ecosystems ...

Scientists spot a rare giant phantom jellyfish off Argentina a potent reminder of how unexplored, vital and vulnerable our oceans ...

95% water but 100% lethal? With their tentacles, some of these jellyfish's stings could stop your heart. Why are certain jellyfish just ...