Ocean

Jellyfish were able to learn where obstacles were placed and actively avoid them.

Hebrew University team evaluates role of gyral circulation on temperatures in tropics, poles during the Cretaceous period.

The item in question that was recovered is described by the university's website as a "small muzzle-loading cast copper-alloy cannon," and it's believed that its origins are tied to a shipwreck.

The sharks caused damage to the ship's hull, leaving the three men in a dangerous situation.

The vaquita, an extremely rare whale species found only in Mexico, is on the verge of extinction.

This fisherman frequently encounters rare marine creatures resembling cartoon characters or horror films.

In March, the Miami Seaquarium said it reached a "binding agreement" to return the whale to an ocean habitat within two years.

The one-month-old calf was found four miles from the sea without his mother.

"Dry drowning" or "secondary drowning" are terms that refer to rare complications that are more common in children.

These fossils are considered to be especially valuable as it is rare for jellyfish to fossilize because they are made up of 95% water.