From red to blue, harmless to lethal, and microscopic to humongous, jellyfish come in all different shapes and sizes and are some of the most fascinating creatures on the planet. This slideshow ...

In the dark and cold of the months-long polar night, food resources are limited. Some groups of marine organisms in the polar regions overcome this challenge by going into a metabolic resting state in ...

For more than 500 million years – well before dinosaurs ever thought of existing – jellyfish have floated through the world’s oceans. Today, 2,000 species of jellyfish have been discovered around the ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Jellyfish are among the ocean’s most incredible inhabitants ...

For a hungry fish in search of a meal, a jellyfish would seem to be a huge disappointment. These gelatinous animals are 95 percent water. As a result, a cup of live jellyfish provides just five ...

University of Colorado Boulder Professor Nicole Xu is developing biohybrid robotic jellyfish by integrating tiny microelectronic systems into the live animals. Xu has about 15 to 20 moon jellyfish in ...

Scientists wanted to find out whether humans born in space still retained their sense of gravity. So they turned to baby jellyfish ...

Achieving a length of 33 feet is a survival milestone for this giant phantom species. The Stygiomedusa genus contains only 1 member, complicating efforts to define its deep-sea evolution.