The box jellyfish is famous for its venom, but its bizarre collection of 24 eyes may be even more remarkable than its sting.

Even without a central brain, jellyfish can learn from past experiences like humans, mice, and flies, scientists report for the first time. They trained Caribbean box jellyfish (Tripedalia cystophora) ...

One of the biggest mysteries of evolution is how species first developed complex vision. Jellyfish are helping scientists solve this puzzle, as the group has independently evolved eyes at least nine ...

Researchers show how biohybrid robots based on jellyfish could be used to gather climate science data from deep in the Earth's oceans. Jellyfish can't do much besides swim, sting, eat, and breed. They ...

A new study analyzed the sleep patterns of jellyfish and sea anemones and found they share some sleep traits with humans. The research could provide insight into the origins and function of sleep.

The specimens are evidence of how little the squishy, tentacled predators have changed over the history of life on Earth. By Jack Tamisiea Jellyfish have been floating through Earth’s oceans seemingly ...

Ding! The courier hands me an unassuming brown box with “live animals” plastered on the side. I begin carefully unboxing. The cardboard exterior gives way to a white polystyrene clamshell, cloistering ...