The ‘Stygiomedusa gigantea’ was recorded at a depth of 250 meters. Its four arms can reach up to 10 meters in length ...

A Stygiomedusa gigantea, commonly known as the giant phantom jelly, was filmed at 250 meters below the surface.

Jellyfish infestations are troubling tourists and scientists alike. A diver attaches a sensor to a large Echizen jellyfish, Oct. 4, 2005 off the coast of Komatsu in Ishikawa prefecture, Japan. Yomiuri ...

Its presence could make a minuscule fish downright jelly. Scientists were awestruck after discovering a schoolbus-sized phantom jellyfish off the coast of Argentina, as seen in incredible footage shot ...

An exploration out in the deep sea off the coast of Argentina recently unveiled remarkable footage of a massive jellyfish ...

A freshwater jellyfish originally from Asia is roughly the size of a penny and is a rare sight in the Great Lakes. Most of the time, they're stuck to the bottom of the lake as polyps, according to the ...