A chunky marine worm with “shimmering, iridescent fringe” washed up on a beach in the U.K. Experts say it’s something called a sea mouse.

Another “doomsday fish” (a giant oarfish from the deep) washed ashore in Southern California. Are we in for some sort of disaster?

A wildlife photographer spotted a rare all-black king penguin on South Georgia Island and captured some photos and videos. See them here.

A tapir swam for its life as a jaguar stalked it from the riverbank in South America. Do you think it got away?

A California family let their dog out in the morning, and it chased a cat up a tree—except the “cat” was actually a mountain lion.

A black bear in Canada was hungry for eagle of all things, so it decided to climb a tree to get to a nest. Watch the insane footage here.

A wildlife photographer captured a video of a osprey vs. pelican mid-air battle. Which bird do you think will fly away with the prized fish?

A young puma saw its reflection in some water in the Guatemalan jungle, and it didn’t like what it saw at all. Watch here.

A photo of a river in Tanzania shows a ton of large, gray river rocks . . . except they’re not river rocks, they’re hippos. But why so many?

Two South American predators went head to head in the Pantanal, and someone was there to capture a video. See a jaguar vs. caiman battle.