a girl exclaims. “I think they’re just mesmerizing,” Jennie Janssen, the assistant curator who oversees the care of the aquarium’s jellyfish, tells me. “They don’t have a brain, ...

This last one is particularly scary, as the sting from a sea wasp is powerful enough to cause cardiac arrest, even in seemingly healthy victims. These are not jellyfish you want to cross.

Jellyfish are known for drifting to and fro at the whim of ocean currents—but not all species are so passive. The millions of golden jellyfish that pack Palau’s Jellyfish Lake spend much of ...

Charleston County's beaches have turned into a jellyfish graveyard over the past few weeks. Visitors to the beaches have to keep their eyes to the ground to avoid stepping onto one of the ...