A two-headed bull shark foetus has been found by fishermen in the Gulf of Mexico.
The specimen is the first recorded incidence of the condition, known as axial bifurcation, in a bull shark or Carcharhinus leucas.
The find was published in the Journal of Fish Biology.
It noted: “External examination, Radiography and magnetic resonance imaging revealed a case of monosomic dicephalia where the axial skeleton and internal organs were found to divide into parallel systems anterior to the pectoral girdle resulting in two well-developed heads.”
Michael Wagner, a study co-author and researcher at Michigan State University said the deformity is the result of an embryo beginning to split into twins, but doing so incompletely.
The foetus was live when it was found, but probably wouldn’t have lived for very long in the wild, Wagner told OurAmazingPlanet.
He said: "When you're a predator that needs to move fast to catch other fast-moving fish … that'd be nearly impossible with this mutation."
A further reason the shark wouldn’t have lived long is its small body.
Wagner added: “It had two very developed heads, but a very stunted body.”
Five-Legged Holy Cow!
This five-legged cow's owner, Laxman Bhosale, said the cow "holds the essence of Hindu religion" and touching its fifth leg will help "fulfill all your wishes," BBC reports. Now, the holy cow is on tour in India. Newly released photos show it decorated in beads and fancy fabric, hanging out in the back of a fancy trailer, according to the Daily Mail. Her fifth leg protrudes from her shoulder and neck area. <a href="http://www.huffingtonpost.com/2014/02/24/five-legged-cow-india-fulfill-all-your-wishes_n_4848544.html?1393273307" target="_hplink">READ MORE</a>
Super Fat Cat
This Thursday, April 19, 2012 photo provided by the Santa Fe Animal Shelter veterinarian Dr. Jennifer Steketee holds Meow, a 2-year-old tabby at the shelter in Santa Fe, N.M. Meow, arrived at the shelter weighing in at over 39 pounds, after his elderly owner could no longer care for the feline. The shelter plans to put the cat on a special diet so he can lose weight gradually. Adult cats typically weigh between 7 and 12 pounds. (AP Photo/Santa Fe Animal Shelter, Ben Swan)
Two-headed Turtle Hatches At San Antonio Zoo
A two-headed turtle has hatched at the San Antonio Zoo and officials have named her Thelma and Louise.
Six Legged Calf
Six-legged calf "Lilli" stands on the pasture of its owner Andreas Knutti, in Weissenburg, Switzerland, Thursday, March 29, 2012. The calf was born seven weeks ago with two additional legs on its back. (Peter Schneider, Keystone / AP)
A man displays a two-headed turtle 'Testudo horsfieldi' at National Museum of natural history in Kiev, Ukraine, Monday, March 5, 2012. Besides the two heads the reptile has six legs.
These photos were included in a report that advocated for increasing the amount of selenium in Southern Idaho's creeks.
Harvey Dent, the two-faced kitten born in Florida. Unfortunately Harvey Dent passed away from complications at just two days old.
Two-headed animals and other bizarre creatures
The two heads of this razorback musk turtle have been named Teeny and Tiny by Todd Ray of the Venice Beach Freakshow. He believes it is the smallest two-headed turtle he's ever seen.
6-Legged Lamb Born In Georgia
A Georgian farmer was shocked Jan. 25 when one of his sheep gave birth to a lamb with six legs. This peculiar critter has four legs at the front and two at the back.
Freeze-dried Two-headed Pig
Three-eyed Fish found near Argentina. Source: GIzmodo
Two-headed Turtle May Be Surgically Separated
Todd Ray, who has what is believed to be the world's largest collection of two-headed animals, is considering whether or not he should surgically separate this two-headed turtle.
Pig with Two Snouts
This tiny porker has an excuse for making a pig of himself at mealtimes - he really does have two mouths to feed. The bizarre two-month-old youngster - part of a litter born on a farm in Deshengtang, Jilin province, northern China - can use both his mouths to eat and appears otherwise normal, say his owners. Farmer Li Zhenjun and his wife Yu Wanfen named the piglet Xiaobao - or 'Babe' in English - after the movie about an extraordinary talking pig. Li explained: "The mouths aren't much of an advantage because his head is very heavy and he gets pushed around by the others." "I'm feeding her with a bottle now and she's doing very well," he added.
Two Headed Snake 2011
"Us" is a 2 1/2-year-old, 4-foot long, two-headed carpet python residing at the World Aquarium in St. Louis. According to aquarium President Leonard Sonnenschein, it may be the only one in the world.
Two Headed Turtle 2010
Sonnenschein likened this unique musk turtle to the Pushmi-pullyu from the "Dr. Dolittle" story.
Unicorn Cow 2010
A dairy farm in China has an unusual cow that has three horns -- two on either side of its head and one in the middle like a rhino horn. Farmer Jia Kebing, from Baoding in northern China's Hebei province, said the 2-year-old cow was born with a small bump on its forehead. "With time the bump grew bigger and longer and become a sharp horn," said Jia. The middle horn now measures nearly 8 inches long.
Two Head Cows 2010
Egyptian farmers feed a two-headed calf, which can't stand on its own legs because it is top heavy, at a village near Alexandria, Egypt.
2 headed calf 2009
A vet feeds five month two-headed calf "Milagritos" (Little Miracle) in Cajamarca, Peru, on Aug. 19, 2009.
We, a two-headed hermaphroditic rat snake, lived at the World Aquarium in St. Louis for 8 1/2 years before dying in June of 2007. In 2006, the aquarium unsuccessfully attempted to mate it with another two-headed snake.
Two Headed Pig 2007
A newly born piglet with one head, two mouths, two noses and three eyes is reflected by mirrors on March 6, 2007, in China.
Two Headed Turtle 2007
Store manager Jay Jacoby displays a two-headed red slider turtle at Big Al's Aquarium Supercenter in East Norriton, Pa.
Two baby conjoined barn swallows rest after a fall from their nest in Searcy, Ark. The rare bird discovery was made by a White County resident in her front yard.
Janus, the Geneva Museum of Natural History's two-headed Greek tortoise, is presented to the press and the public during the official celebration of its 10th birthday on Sept. 5, 2007. Janus, named after the two-headed Roman god was born Sept. 3, 1997.
Kirk Heldreth pets his two-faced Holstein calf in 2007, in Rural Retreat, Va. Despite her malformed mouth, the calf named Star fed from a bottle and is won over Heldreth, who didn't expect her to live long after her birth. He had considered donating the calf to Virginia Tech for scientific purposes, or even selling her for show. Star has been drawing the curious to Heldreth's southwest Virginia farm, which sees about 40 to 50 visitors daily.
Six Legged Lamb 2006
Belgian grower Maurice Peeters holds a six-legged lamb a day after its birth March 18, 2006, in Meeuwen-Gruitrode.
Gemini The Two-Headed Cat
Gemini, a kitten from Rhode Island, had an unfortunately short life.