From the Monterey Bay Aquarium: “The ocean sunfish ( Mola mola) looks like the invention of a mad scientist. Huge and flat, ...

Boaters got “lucky enough” to spot a plethora of sea creatures off the coast of California, spotting multiple species in one ...

Fusulines thrived in cold seas but vanished twice when warming from volcanoes rapidly spiked ocean carbon levels.

Sea creatures were spotted off the coast of California. Getty Images/iStockphoto Sea creatures off the coast of California made for a moment where boaters thought they were in a “simulation.” On June ...

Our planet is home to some of the most fascinating creatures that can survive without a brain and thrive without a complex nervous system.

A remotely operated submersible saw the “semi-gelatinous” animal lying on the ocean floor and “flying underwater.” Take a look.

A 15-year-old sea lion named Ronan proved better at keeping a beat than 10 college students in a rhythmic dance-off, researchers reported Thursday in the journal Scientific Reports. The results ...

Catnap wakes up alone at sea, drifting away on a raft. In his fight for survival, he battles deadly sharks and huge ocean storms. Eventually, he lands on a deserted island, but that's just the ...

A bloom of toxic algae along our Southern California coast continues sickening sea lions and other animals.

From sharks that don't hunt other sea creatures to slugs that can photosynthesize, here are some of the rarest marine animals that may surprise you.

The ocean is an average of 3.2km deep. Humans know of about 245,000 marine species. The most common sea animals are those without a backbone, such as jellyfish and shrimp.

Meet the leaf sheep, a cute little animal-plant hybrid that can photosynthesize to generate extra energy within its body.