TEXAS, USA — A couple of strange-looking jellyfish spotted on North Padre Island this week turned out to be Atlantic box jellyfish, according to researchers with the Harte Research Institute. Jace ...

An upside-down jellyfish drifts in a shallow lagoon, rhythmically contracting its translucent bell. By night that beat drops from roughly 36 pulses a minute to nearer 30, and the animal slips into a ...

University of Cambridge and Anglia Ruskin University (ARU) provide funding as members of The Conversation UK. An upside-down jellyfish drifts in a shallow lagoon, rhythmically contracting its ...

Venomous animals are unique species that produce and utilize specialized toxins by injecting prey or predators using bites, stings or spines. They primarily inject venom in order to capture their prey ...

Turns out jellyfish and sea anemones – among the ancient creatures with a nervous system instead of a brain – have a very similar sleeping routine to our own. A new study published in Nature ...

Jellyfish are often grouped together as similar threats, but comparisons tell a different story. This video ranks multiple jellyfish species based on venom potency, behavior, and documented ...

Humans began sleeping as a way to partly help reduce DNA damage in nerve cells, scientists at Bar-Ilan University in Israel discovered while studying jellyfish and sea anemones. Both species sleep for ...

Jellyfish and sea anemones are curious creatures: these organisms evolved without a brain and, as scientists discovered only in the past few years, don’t need one to sleep. The animals do, however, ...

These rare sea creatures live where the sun don't shine. By Laura Baisas Published Jan 6, 2026 4:15 PM EST Get the Popular Science daily newsletter💡 Breakthroughs ...

Jellyfish seem to sleep for about 8 hours a day, take midday naps and snooze more after a bad night’s sleep – just like us. Sleep is thought to have first evolved in marine creatures like these, and ...

Neither jellyfish nor sea anemones have brains. But these animals sleep in ways strikingly similar to humans, according to a study published today in Nature Communications 1. The findings bolster a ...