The curious minds at What If reveal the scariest ocean creatures you never knew existed, exploring deep-sea predators, bizarre adaptations, and unseen terror.

A newly studied deep-sea hotspot reveals thousands of creatures lurking in warmth and darkness near an underwater volcano.

As demand for critical metals grows, scientists have taken a rare, close look at life on the deep Pacific seabed where mining ...

Deep beneath Kentucky, scientists have uncovered something no one expected, perfectly preserved predators from an ancient sea hidden for over 300 million years.

Scientists filmed a squid covering itself in mud and holding its tentacles upright, using camouflage that helps it hide on the ocean floor.

Gray wolves are hunting sea otters. Scientists are studying how land predators adapt to ocean hunting and what this means for ecosystems.

Here, they saw up to 15 gloomy octopuses getting on with their lives. These individuals weren’t just living close to each ...

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

In Earth’s deepest waters, survival depends on aggression, stealth, and biology built for killing in darkness. This video ...

The Loggerhead Marinelife Center announced that it released a loggerhead sea turtle named Pyari that had been missing her ...

When researchers from the University of British Columbia set out to film the solitary hunting habits of Northern resident ...

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