Jellyfish Day honors one of Earth’s oldest and most fascinating creatures, glowing reminders of resilience beneath the waves.

A new species of venomous Portuguese man-of-war, Physalia mikazuki, has been discovered in northern Japan. Genetic evidence ...

The Portuguese man-of-war, or Physalia, is a jelly-like creature that uses a special gas-filled balloon to float on the sea surface. Physalia inhabits the area where the ocean meets the atmosphere, in ...

I still remember the exact moment the photo hit my phone. I was standing in a muddy driveway in Massachusetts, coffee going ...

CHARLESTOWN, R.I. (WPRI) ─ Sen. Jack Reed is calling upon the National Oceanic and Atmospheric Administration (NOAA) to investigate the significant increase in the sea nettle jellyfish population at ...

This time-lapse composite image shows a biohybrid robot jellyfish descending through the three-story tank designed for testing the swimming abilities of the modified creatures. Jellyfish can't do much ...

A box jellyfish advisory has been issued for south-facing shores of Oahu, which include Waikiki and Ala Moana beaches.

Israeli researchers said Wednesday they have identified an Indian Ocean sea slug now hunting jellyfish polyps off Israel’s ...

Climate change is putting countless marine organisms under pressure. However, jellyfish in the world’s oceans could actually benefit from the rising water temperatures – also and especially in the ...

Every year, World Jellyfish Day celebrates one of the ocean’s most enigmatic creatures. Graceful yet dangerous, simple yet ...

Here are the U.S. beaches with the most jellyfish stings, plus which species are common, and expert tips on how to avoid and ...