11 Fascinating Facts About the Frilled Shark

Sometimes called a “living fossil” because it has changed so little since prehistoric times, the eel-like frilled shark—which is rarely seen by humans—has been in the news this week after a snake-like one was found off the coast of Portugal. Here’s a quick primer.

1. IT’S NAMED FOR ITS GILLS.

Its scientific name is Chlamydoselachus anguineus, but this creature’s common name comes from its gills: Unlike all other sharks, which have separate gills, C. anguineus’ first pair of gills go all the way across its throat; each pair is lined at the edges with red “fringe.”

2. IT WAS DISCOVERED IN THE 19TH CENTURY.

The sharks were first scientifically described by German ichthyologist Ludwig H.P. Döderlein, who taught at Tokyo University from 1879 to 1881 and brought two specimens captured in Tokyo Bay when he returned to Vienna. His paper describing the sharks was lost, however, so the first description comes from Samuel Garman in the 1884 edition of the Bulletin of Essex Institute. In the remarks after the description, Garman noted that

Such an animal as that described is very likely to unsettle disbelief in what is popularly called the “sea serpent.” Though it could hardly on examination be taken for anything but a shark, its appearance in the forward portion of the body, particularly in the head, brings vividly to mind the triangular heads, deep-cleft mouths, and fierce looks of many of our most dreaded snakes. In view of the possible discoveries of the future, the fact of the existence of such creatures, so recently undiscovered, certainly calls for a suspension of judgment in regard to the non-existence of that oft-appearing but elusive creature, the serpent-like monster of the oceans.

The frilled shark’s species name, anguineus, is Latin for “consisting of snakes” or “snaky.”

Biologist David A. Ebert, director of the Pacific Shark Research Center, described a second frilled shark species—Chlamydoselachus africana, which lives off the coast of Africa and is about half as long as its predecessor—in 2009.

3. IT’S GOT INSANE TEETH.

The frilled shark’s mouth is just as terrifying as the maw of a great white: It’s lined with 25 rows of backward-facing, trident-shaped teeth—300 in all. “The teeth are constructed for grasping and from their peculiar shape and sharpness it would seem as if nothing that once came within their reach could escape them,” Garman wrote. “Even in the dead specimen the formidable three-pronged teeth make the mouth a troublesome one to explore.” 

Ebert can testify to that fact. “I can tell you from snagging my fingers on the teeth, you can only back out one way and that’s in toward the mouth and then out,” he told WIRED. “It didn’t feel good, I can tell you that.” The shark uses the bright white teeth, which sharply contrast against its brown body, to lure in prey: “By the time [the prey] realize, Oh, that’s the teeth of a shark, they’re too close and the shark is able to ambush them at that point,” Ebert said. “It’s almost like when you drive out of a parking lot exit and they have the spikes sticking out that say, ‘Do not back up.’ That’s kind of what happens when these things catch prey items.”

And as if its teeth weren’t freaky enough, the frilled shark has spines, called dermal denticles, lining its mouth. So if you happen to see one of these anywhere, it’s better to look and not touch.

4. IT “HOVERS” IN THE WATER...

Scientists once believed that the frilled shark wriggled through the water like an eel. But according to the ReefQuest Centre for Shark Research, “its body cavity is elongate and packed with a huge liver perfused with low-density oils and hydrocarbons, making the shark almost neutrally buoyant at depth.”

5. … AND IT MAY STRIKE AT ITS PREY LIKE A SNAKE.

No one has ever observed the frilled shark hunting, but scientists believe that it uses its posterior fins as propulsive surfaces to launch itself at its prey. Its long jaws, which terminate at the back of its head, may allow the animal to gape extra wide and take in prey half as long as its body. Analysis of the stomach contents of captured specimens has revealed that the frilled shark’s diet is 61 percent cephalopod, 11 percent teleost fishes, and, occasionally, other sharks.

6. IT’S FOUND ALL OVER THE WORLD—BUT YOU PROBABLY WON’T SEE IT.

The Food and Agriculture Organization of the United Nations notes that the frilled shark is “wide-ranging but spottily distributed”; you can see where the shark is found on the map above. It typically resides in depths between 390 and 4200 feet, so people rarely see these sharks unless they venture to the surface, which isn’t unheard of (as you’ll see below).

7. FEMALES ARE BIGGER THAN MALES.

On average, males range from 3.2 to 3.6 feet and females from 4.4 to 4.9 feet; the maximum these sharks can reach is 6.4 feet.

8. THEIR GESTATION PERIOD MAY BE 3.5 YEARS LONG.

A study of frilled sharks in Japan revealed that the animals breed year-round; litters typically consist of six pups, which emerge from eggs while still in the mother’s uterus and are then born live. Scientists think the shark may have the longest gestation period ever: Frilled sharks could gestate for as long as 42 months, nearly twice as long as African elephants carry their young. Scientists theorize that the extreme length has something to do with the shark’s cold deep sea habitat.

9. IT WASN’T SEEN IN ITS NATURAL HABITAT UNTIL 2004.

NOAA scientists exploring the “Latitude 31-30 Transect” in the Atlantic Ocean captured a video of a frilled shark “swimming over sea bottom that was covered with tiny sand dunes” during a submersible dive. “This species has been, on rare occasion, caught or taken in bottom trawls,” the site notes. “To the knowledge of everyone on board, however, this was the first time anyone had ever seen the rare species in its natural habitat.”

10. ONE WAS CAPTURED IN JAPAN IN 2007.

In January 2007, a Japanese fisherman spotted a strange, eel-like creature with a mouth full of sharp teeth near the surface; he alerted the staff of the Awashima Marine Park in Shizuoka, who captured the animal and transferred it to a seawater pool, where they filmed it. “We think it may have come close to the surface because it was sick, or else it was weakened because it was in shallow waters,” a park official said. “We believe moving pictures of a live specimen are extremely rare. They live between 600 and 1000 meters under the water, which is deeper than humans can go.” The shark, a female, died a few hours after its capture.

11. IT CALLS ANOTHER FREAKY SHARK ITS COUSIN.

The frilled shark might have rows upon rows of gnarly teeth, but its cousin, the goblin shark, can thrust its jaw out of its face. Which is more terrifying?

The 8 Most Expensive Dog Breeds in the World

iStock/ClarkandCompany
iStock/ClarkandCompany

Big dogs, little dogs. Fuzzy, hairless. Tiny ears, floppy ears. Shelter dogs, fancy dogs. We love them all (especially shelter dogs). While Americans shell out an average of about $1675 per year on their dogs, purebred-loving pet parents are willing to pay more than five times that just to acquire the breed they've always dreamed of. Here are eight of the most expensive dog breeds in the world, according to The Dog Digest.

1. LÖWCHEN

Nancy, a 18-month-old Lowchen or Little Lion Dog bitch, poses for a photograph on the second day of Crufts Dog Show at the NEC Arena on March 10, 2017 in Birmingham, England.
Matt Cardy, Getty Images

​Löwchens are a petite, long-haired dog that have been a popular breed since the Renaissance, and are even featured prominently in paintings from that period. Nowadays, these "little lions" are extremely rare, pushing their cost to as much as $10,000 in some places around the world.

2. SAMOYED

A Samoyed sits in a flower-filled field
iStock/bruev

This breed's name comes from the Samoyedic peoples of Siberia, who used these fluffy white dogs to herd reindeer and pull sleds for their nomadic groups. The competitive, strong dogs can cost from $8000 to $10,000.

3. TIBETAN MASTIFF

Beautiful Tibetan mastiff on the background of the winter landscape of nature
iStock/~User7565abab_575

The Tibetan Mastiff originated with the ancient nomadic cultures of China, Nepal, and Tibet. Tribes of Himachal Pradesh used this breed as a guard to protect sheep from predators, making them a very protective breed for any owner. The massive dogs can weigh up to 160 pounds and be as tall as 33 inches. The price for this breed is equally as massive, reaching up to $7000.

4. PHARAOH HOUND

Pharaoh hound with a leather collar lying down on a snow in winter
iStock/Eudyptula

The Pharaoh Hound is a Maltese breed whose native name, Kelb tal-Fenek, means "rabbit dog," because they were traditionally used for hunting rabbits. These dogs are highly intelligent as well as athletic. Some bloodlines of this breed can cost owners $6500. We hope the rabbits are worth it!

5. AKITA

Akita dog in grass
iStock/baiajaku

The Akita breed originated from the mountainous regions of northern Japan. An Akita can be categorized as either a Japanese or an American Akita, but all come with a short double-coat similar to that of a Siberian Husky. Certain breeds of the Akita can be priced as high as $4500.

6. AZAWAKH

Azawakh on a white background
iStock/fotojagodka

The West African Azawakh is one of the few breeds of African breeds that is available for purchase in the United States and Canada. This lively dog requires lots of physical activity and moves with a distinct feline gait. They can be identified by their almond eyes, thin bodies, and sandy color. These exotic pooches can be priced from $3000 and up.

7. PERUVIAN INCA ORCHID

Photo of a Peruvian hairless dog
iStock/manx_in_the_world

This pup is a hairless dog with origins in Peruvian pre-Inca cultures. As they're completely hairless with elephant grey skin, the dogs are quite unique in appearance. This breed is priced up to $3000.

8. SALUKI

Portrait of a Elegant Saluki Arabian Hound
iStock/ClarkandCompany

​The Saluki is the Royal Dog of Egypt, meaning it has been man's best friend since the pharaohs roamed the pyramids. Salukis are classed as a sighthound, with long legs and a deep chest. Being tall and lean, the males can weigh up to 60 pounds and measure up to 28 inches. Prices of these pups can reach up to $2500.

5 Ways You Can Help California's Wildfire Victims

Fire Captain Steve Millosovich carries a cage full of cats after a wildfire destroyed homes and land in Paradise, California.
Fire Captain Steve Millosovich carries a cage full of cats after a wildfire destroyed homes and land in Paradise, California.
Justin Sullivan, Getty Images

The “Camp Fire” in Northern California’s Butte County has killed more than 40 people and destroyed more than 7100 homes since it started tearing through the region on November 8. Authorities are still investigating the cause, but it has already been labeled the deadliest wildfire in California’s history. At the same time, two other fires—Woolsey and Hill—have been wreaking damage in areas northwest of Los Angeles. Here are some ways you can help the victims.

1. DONATE MONEY

Making a financial contribution to a nonprofit that’s helping wildfire victims is usually the best way of ensuring your donation will be utilized, according to the Center for International Disaster Information. The flexibility of a monetary donation lets disaster responders decide what’s most needed at any given moment. Listed below are a few of the charities and companies accepting donations on behalf of victims, according to The New York Times.

American Red Cross

California Community Foundation’s Wildlife Relief Fund

California Fire Foundation

Enloe Medical Center

Google (Scroll down and click "Yes, Donate")

Humane Society of Ventura County

North Valley Community Foundation

Salvation Army

United Way of Greater Los Angeles

Before determining which charity to choose, it pays to visit Charity Navigator and do a little bit of research to determine which organizations are the most reputable, and how much of your donation will make it directly to the victims.

2. DONATE FOOD

If you’re based in California and want to contribute something other than money, you have a few options. But first, make sure you’re choosing an organization that has the time and resources to coordinate these donations. Los Angeles firefighters, for example, received way more goods (to the tune of 5000 pounds) than they could handle. However, you can still donate non-perishable food items to the Salvation Army Ventura Corps, which is assisting individuals affected by the Woolsey and Hill fires in Southern California. If you happen to see days-old requests for donated goods, just visit that organization's website or social media channels first to make sure they aren't at full capacity.

3. OPEN UP YOUR HOME

Airbnb is encouraging people in the Butte County region to open up their homes to wildfire victims while the figure out longer-term arrangements. From now through November 29, Airbnb users can advertise their homes as free, temporary shelters for aid workers and evacuees, The New York Times reports. Hosts have the chance to communicate with potential guests in advance, and hosts can also determine the length of stay. Hosts in Butte County are welcome to sign up (click here for more info), as well as those living in Ventura, Los Angeles, Santa Barbara, and San Diego counties (click here for info).

4. FOSTER OR ADOPT A PET

Just as humans are being displaced by California's wildfires, so too are their pets. Whether it's because they've been separated from their families or their pet parents are in a temporary living situation that does not allow for animals, hundreds of now-homeless pets are arriving at shelters around California every day. In order to make as much room as possible for more intakes, LA Animal Services posted an urgent call for fosters and adopters on its Facebook page. If you're not in the California area, donating money and supplies to these same shelters is also an option. SPCAla, for example, has set up an Amazon Wish List.

5. VOLUNTEER YOUR TIME AND EXPERTISE

Caring Choices, a nonprofit in Northern California, is currently accepting applications from volunteers with medical backgrounds or other skills—such as data entry, radio communications, or animal care—that are currently needed. (Manual skills, like being able to remove debris, are also listed on the volunteer application form.)

They’ve already received thousands of volunteer applications and aren’t able to sift through them all immediately, but they’re still urging volunteers in the region to apply. “This a marathon and not a sprint,” the organization wrote on its website. “We will need more volunteers in the coming weeks and months as we continue through the disaster response, relief, and recovery efforts.” To apply, fill out this application and email it to aavendano@caring-choices.org. You may also want to consider volunteering with the United Way or The American Red Cross.

Keep checking California Volunteers for additional volunteer opportunities.

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