HILTON HEAD ISLAND, S.C. – While on Hilton Head Island, beachgoer Jeffrey Gelinas came across a jellyfish larger than his size 13 shoe. Tybee Beach Ecology T r ips helped WSAV identify the ...

It catches small fish and plankton with its tentacles. The Nomura’s Jellyfish, scientific name Nemopilema nomurai, is another very big and heavy species, weighing up to 440 pounds (200 kg).

How, no one knows. “A big jellyfish bloom makes the headlines, while a lack of a jellyfish bloom isn’t even worth reporting,” says Lucas Brotz, a marine zoologist at the University of ...

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 ...

"The sea is full of them and it's a big problem for biodiversity," says Silvio Greco, describing jellyfish as rampant, opportunistic species that immediately take over any empty space in the water.