Biggest in photo is just over 3 inches across. In recent decades jellyfish populations in some parts of the world have boomed. In the 1980s a comb jelly that’s known formally as Mnemiopsis ...

Why it's awesome: Earth's oceans are home to many secretive and unusual creatures that humans rarely see — including giant ...

The infamous box jellyfish developed its frighteningly powerful ... Their venom is considered to be among the most deadly in the world, containing toxins that attack the heart, nervous system ...

Hundreds of jellyfish threaten to shut down an Israeli power plant every summer. In recent years, several other power plants around the world have faced the same threat. More from Science Hundreds ...

Jellyfish have survived for over 500 million years, making them more ancient than the dinosaurs. Today these otherworldly creatures can be found around the world, from coastal shallows to the ocean ...

(CN) — Researchers at the California Institute of Technology are using jellyfish in their labs to make discoveries in the areas of biology, deep-sea dynamics and engineering. Jellyfish have roamed ...

Grammys red carpet was a jellyfish haircut fest. See the best looks from the evening on Lady Gaga, Miley Cyrus, and Billie ...