A $20,000 reward is being offered for information that leads to the suspect who decapitated a sea lion on a California beach.

Who knew a baby sea lion could turn into the next big underwater sensation? Well, that’s exactly what’s happening at the ...

Someone cut off the head of a sea lion in Northern California and rode off with it in a bag. Authorities are now offering $20 ...

NOAA officials are looking for a suspect seen using a black 8-inch knife to remove the deceased sea lion's head.

A 9-month-old sea lion at a Tacoma aquarium performs intricate rhythmic gymnastics-esque circles with an artificial kelp ...

Who knew that a sea lion could be so graceful? One zoo shared a video of one of their residents putting on a majestic underwater performance.

A rare oarfish, often called the "doomsday fish," was spotted in Mexico—just days after another deep-sea creature, a deep-sea anglerfish, made a rare appearance in daylight.

“When conditions are right, waters off the coast of California can experience large-scale toxic algal blooms that are capable ...

By now, you might be wondering how sea lions got into this list of the smartest marine animals. Here’s proof: Marine researchers in the United States have concluded that these creatures are so ...

More than 50 sickened adult sea lions have been found on beaches in Southern California in the last few days, demonstrating symptoms indicating they had ingested food poisoned by a toxic algae ...