Even jellyfish need sleep, despite lacking brains. Discover why this finding is challenging everything we thought we knew.

In jellyfish and sea anemones, neurons accumulate DNA damage while animals are awake and repair that damage during sleep.

A recent deep-sea expedition along the country's entire length documented the jellyfish, along with a surprising number of other species ...

With every expedition to the deep sea, we find the Ocean is full of life—as much as we see on land, and perhaps more because ...

During a dive off Argentina, scientists documented a rare jellyfish discovered a little over a century ago and seldom seen since, as well as the fish that keep it company.

The elusive deep-sea creature typically lives over 1,000 meters below sea level, but was seen at around 250 meters. The discovery came amid findings of vast coral reefs and suspected new species.

Scientists with the Schmidt Ocean Institute discovered a rare giant phantom jellyfish during a deep-sea exploration off ...

A rare deep sea video of a giant phantom jellyfish drifting through the dark waters off Argentina has stunned viewers and ...

ROV pilots managed to capture video of the giant sea creature, officially known as Stygiomedusa gigantea, swimming approximately 830 feet below the water’s surface.

The marine biologists of the Schmidt Ocean Institute are a busy bunch. Over the last few years, scientists aboard the research vessel Falkor (too) have spotted rare Antarctic squid, discovered ...

In the mesmerizing footage, captured via an autonomous submersible known as ROV SuBastian, the Goliath sea jelly is seen ...

The team traveled along the entire length of the coastline and found the largest known Bathelia candida coral reef anywhere ...