Phylliroe is a type of nudibranch, or sea slug, that has evolved to look and swim like a fish. And that's not the only weird thing about it.

A humpback whale fell victim to a swarm of sharks, which are usually known to hunt much smaller prey.

The surprising find shows just how much there is to learn about the biodiversity of southern Oregon's mountainous region.

The breeding of these extremely rare, enormous insects is one of the most inspiring stories in the history of conservation.

Otherworldly caves naturally lit by the eerie gleam of glowworms are a sight to behold.

Who or what is making the sound remains a mystery, but it may be a 'dinner bell' signaling feeding time for deep sea creatures.

How this little prince grew into the tyrant king of the dinosaur world.

Bizarre fish has evolved fins like no other and is capable of walking like a land animal.

Nile crocodiles are known for being maneaters, and now they've been accidentally introduced to Florida.

Video could finally offer insight into the mysteries about how sharks get their shuteye.

Closest living relative of Arktocara yakataga can only be found in rivers in South Asia.

They don't have a queen or any larvae, but these resilient insects are still trying to eke out an existence.

Why are these crocodiles orange? One grotesque theory about their coloration might shock you.

A newly discovered hybrid of aurochs and ice age bison has been affectionately called the 'Higgs bison' due to its elusive nature.

Illacme tobini is the second leggiest animal species on the planet — but that's not it's only odd feature.

Thousands of people have been walking over the fossil for decades without knowing it.

Video settles who is truly atop the ocean food chain.

Metallic noise, captured from the deepest point on Earth's surface, likely belongs to a species of baleen whale, scientists say.

From 11:57 p.m. to midnight each night, sheep have been stampeding through Times Square.

New fossil reminds us of the bizarre life that once inhabited our planet.

The harrowing story of how the dog managed to finish the race with his adopted companions will melt your heart.

Following fresh eyewitness evidence, researchers are placing dozens of camera traps in a remote region of Australia.

Australian researchers have traced the largest dinosaur footprint ever found, an intimidating 5-foot, 9-inch long impression made by a giant sauropod.

Scientists have never seen a giant shipworm (Kuphus polythalamia) alive before, and it's the stuff of nightmares.

Scientists aren't yet sure if this is a unique phenomenon or if it's something all snakes are capable of.

Species is so rare that it hasn't been seen since an account in 1873.

The now-extinct pouwa was a semi-flightless swan that was closely related to the Australian black swan of modern times.

Helicopter-like aerial drones will patrol off the coast of popular Australian beaches.

Once the 2011 tsunami rolled back into the ocean, it swept marine life as far away as California.

Zoom in on this supposed image of sheep on a hillside and you'll be in for quite the surprise.

This unexpected clash of alligators and sharks demonstrates which animal really sits atop the estuarine food chain.

A terrifying, meat-eating worm is named after John Bobbitt — you know, that terrible episode from 1993 involving Lorena Bobbit and a big knife.

The unknown species is believed to be a snailfish with 'large wing-like fins and a head resembling a cartoon dog.'

Sea urchins have light-sensitive cells on their feet that give them low-resolution vision. But for an animal with no eyes, that ability does the trick.

The last time they squirmed was in the Pleistocene Age.

It stretches for at least 85 miles and is likely the keystone source of the region's fisheries.

New research backs the tortoise in the classic fable, suggesting slow and steady always wins, no matter the race.

The Inaccessible Island rail (Atlantisia rogersi) can only be found on a single Atlantic island in the middle of nowhere. Here's how it got there.

Nicknamed the 'psychedelic Medusa,' this fascinating jellyfish was spotted during a NOAA research mission.

Some hummingbirds have evolved beaks better suited for fencing than feeding.

These invasive species are wreaking havoc on reefs and the fish that live amongst the coral.

While dolphins and whales might get all the attention, here are some lesser-known sea creatures that are just as magnificent.

The series, which is celebrating its 50th anniversary this month, has the highest number of adult-child coviewing experiences of any children’s show.

'To Be of Service' film shows how service dogs help veterans return to the world.

The U.S. Women's Soccer team got a visit from service dogs in training before their match Thursday.

Under Vet Friends Foundation, military veterans adopt senior dogs looking for homes, creating beautiful new relationships.

How you train your dog can affect his happiness and stress levels long-term, study finds.

Puppies are born blind and mostly deaf, so they rely on you to meet all of their needs. From feeding to warmth, here's how to care for a newborn puppy.

Study is recruiting 10,000 canine citizen scientists for national dog aging project.

Quilty the rescue cat will not be contained at the shelter.