A British dad has begun the challenge of becoming the first person to swim across the Atlantic Ocean.
Ben Hooper, 38, from Cheltenham will have to swim at least 3,218 km and is hoping to raise $2 million for charity during the record-breaking attempt.
He set off from Dakar harbour in Senegal, west Africa, on Sunday and hopes to arrive in Brazil, South America, in March 2017.
Other people have attempted the challenge but were not approved by Guinness World Records.
Some dangers that brave Ben will face along the way include sharks, storms, 20 ft waves and stinging jellyfish.
He is wearing a special camouflaged wetsuit to protect him from predators lurking below. He even has a special spray he uses to keep the sharks away.
Ben will swim around 10 hours a day, and will need to eat a hefty 12,000 calories (about five times the recommended amount for a man) to fuel his adventure.
But he has a support boat and crew to help him along the way – and give him a place to sleep at night.