Retired soccer superstar David Beckham was reportedly banned from swimming in the Amazon River amid fears deadly fish would attack him.
The former England international captain spent two weeks trekking through the South American rainforest and was filmed for a new BBC documentary ahead of the 2014 World Cup in Brazil.
However, it has now emerged he was advised not to head into the water for a dip as shoals of candiru, also known as 'vampire fish', which can invade and infect the human urethra, are prevalent in the river.
A source tells the New York Daily News, "Talent and crew were given full-length medical and terrain awareness courses before the journey. It was a key part of their process and necessary to get insurances before their trip under BBC guidelines.
"One of the most dangerous creatures in the world lives in the Amazon River, and for men it is both deadly and painful... All the cast were warned not to go into the water, especially because of the vampire fish. It can get under clothing and then swim into the genitalia, which would mean immediate hospitalization."