'I'm naked in the land of venomous snakes!': Contestants on new Discovery show are definitely Naked and Afraid Reality show features naked men and women stranded together in remote locations who must also use their wits and bodies to survive The ratings-grabbing programme is billed as the 'Everest of survival challenges' It would take a brave soul to strip off and bare all for new reality show Naked and Afraid. Deposited in the jungle without food and water, their breath jagged and shallow, and their nerves on edge,the contestants come face to face with hyenas and poisonous snakes, with one muttering: 'God, we're so screwed'. Six strangers were put together for the Discovery show, debuting on Sunday, and stranded in the wilderness. And despite all being experienced survivalists, they're still scared senseless as another admits: 'This is one nasty place...I'm naked in the land of venomous snakes!' Grimy: The contestants on Naked and Afraid had never met before being teamed up to survive in the jungle. Kim Shelton and Shane Lewis can't hide their exhaustion. Survival of the fittest: Nude castaways star on Discovery's Naked and Afraid. Naked and Afraid is billed as taking 'survival of the fittest' to the next level - and dubbed 'the Everest of survival challenges'. Each week, a new pair of complete and total strangers - one man and one woman - will find themselves stranded in and, quite literally, exposed to some of the world's most extreme weather environments. Each duo will be left high and dry with no food, no water and and no clothes. They must survive on their own for a full 21 days, with nothing but one personal item each. The dramatic trailer says that humans can only go three days without water - with the human body beginning to shut down after three weeks without food. And contestants are seen desperately scrambling for something to eat, with one woman seen killing a fish as her partner yells 'chop its head off', as tells it 'you're my dinner.' While another kills a snake, telling the camera: 'It will still bite you even though I cut its damn head off.' Brave: A contestant goes diving for dinner on Naked and Afraid, which starts on Sunday night.ht. Scared: Kim Shelton, 22, a student from Minnesota, stripped off for the Discovery show. The contestants are:Shane Lewis, 40, an electrician from Connecticut who has backpacked around the world. He grew up in foster care and had to adapt to constantly-changing living circumstances. He took off midway through his college education to backpack across the world and has now been to over seventy countries. Shane's teamed up with student Kim Shelton, 22, from Minnesota, who grew up in England but spent every summer in remote Minnesota and has been to wilderness awareness school for two years EJ Snyder, 46, from North Carolina, is a military and survival expert who joined the military aged 19 and is now retired. He's paired up with Kellie Nightlinger, 38, an adventure guide from Alaska, who worked in law enforcement and as a rock minor. She is now a guide for glacier and whale watching adventures - and once survived in the Everglades for a week by herself, even being harpooned by an alligator. Jonathan Klay, 36, a former Marine and bodyguard from LA joined Alison Teal, a 27-year-old surfer and filmmaker from Hawaii who currently lives in a Robinson style grass hut that she built with her parents over the last 20 years. Survival instructor and country and western singer-songwriter Clint Jivoin, 24, from Indiana, says that ninety percent of his diet comes from his own hunting and wild edible plants; however, he is adamant in his disdain for sport hunting: "Disgusting and despicable; if you kill it, then you'd better eat it." 'Naked and afraid': Survivalists Kellie Nightlinger and Erroll James Snyder on the upcoming reality show 'Naked and Afraid' on the Discovery Channel Survivors: 'Naked and Afraid' participants Alison Teal-Blehert Koehn and Jonathan Klay found clothing and built a fire on the Discovery Channel And Clint was teamed up with Laura Zerra, 27, from New Hampshire, a taxidermist and survival instructor, who has a love of danger and has hitchhiked her way around Mexico. Billy Berger, 39, a writer from Georgia who loves deer hunting joins Ky Furneaux, a 39-year-old award-winning stuntwoman from LA, who grew up in the Australian Outback - and who vowed to spend most of her time outside after breaking her back in a car accident. Tattoo artist Puma Cabra, 38, from Nevada, was a professional snowboarder and could then disappear for multiple days with nothing but his knife and his knowledge. He has encountered mountain lions and pulled himself out of six avalanches. He joins Julie Wright, 30, a wilderness instructor from Washington, who has happily lived off the land. "I'm an ultimate survivalist," Kellie Nightlinger, 38, told the Daily News. Tired: One of the contestants looks close to collapse on the Discovery show. Nightlinger said she had been starving after spending two weeks in the wild when she devised an innovative way to catch fish using her private parts as bait and then trapping her meal between her legs. "We needed something with protein and because the water was so muddy, traditional fishing methods wouldn't work, so I had to improvise, adapt and overcome," said Nightlinger. During the night time, the female survivalist and her partner on the show, E.J. Snyder, a retired Army veteran, used a fire that they lit by rubbing sticks together to keep hyenas away. "They were frightening, but at least they seemed to be afraid of fire," she told the Daily News, as EJ is seen to see hyena paw prints, adding: 'This is a hyena print, if there's one, there's more. Other episodes of "Naked and Afraid," featuring different nude paired up strangers, have been filmed in Panama, Costa Rica, the Maldives and Borneo. Nude: Kim Shelton was forced to strip off for TV show Naked and Afraid. Makeshift bikini: Laura Zenna treks through the jungle. Desperate to eat: Kim Shelton and Kellie Nightlinger struggle in the jungle "I think the challenge brings out the very best and very worst," the show's executive producer Steve Rankin told the Daily News from a hospital bed in Costa Rica where he was recovering after being bitten hours earlier by a venomous snake while working on the show. "The idea here is to push the ball down the field," Discovery channel executive, Craig Coffman has said: Survival shows are so common now that it's gotten more and more difficult to convince the audience that what they're watching is something extreme. Having no clothes just takes it to the next level. It's the ultimate test and makes survival exponentially more difficult. The contestants: Shane Lewis and Kim Shelton EJ Snyder and Kellie Nightlinger Jonathan Klay and Alison Teal Clint Jivoin and Laura Zerra Billy Berger and Ky Furneaux Puma Cabra and Julie Wright