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.

An ROV captured footage of a massive, school-bus-sized jellyfish rarely seen by humans because it lives in the deep sea. Watch here. The post Rare, Freakishly Massive Jellyfish Filmed in Deep Sea ...

The oarfish is one of the longest bony fish in the ocean, yet it spends most of its life far beyond human observation. When ...

A recent deep sea exploration off Argentina's coast revealed an incredible video of a giant jellyfish that can grow to be as ...

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

In fact, more people have walked on the Moon than have visited the deepest parts of our oceans. In this world of constant ...

Gamers who love Subnautica's deep sea survival and base building but crave more combat have the perfect Steam game to check out.

Photographers capture mutant crayfish, cleaning fish, and synchronized whales in this year's top underwater contests.

A goblin shark, one of the ocean’s rarest and strangest predators, was spotted near the Canary Islands for the first time.

A dome-fronted submersible sinks beneath the waves off Indonesia, heading down nearly 1,000 meters in search of new species, ...

ABOARD OCEANXPLORER, Indonesia - A dome-fronted submersible sinks beneath the waves off Indonesia, heading down nearly 1,000 ...