Who set the first Guinness World Record for swimming under ice?

Context: Swimming under ice. On 16 March 2000, Hof set the Guinness World Record for farthest swim under ice on his second attempt, with a distance of 57.5 metres. Hof's first attempt the day before failed when he began his swim without goggles and his corneas froze solid and blinded him. A rescue diver pulled him to the surface after he passed out. The record has been broken several times since and is 265 feet as of 2022."

Answer: On 16 March 2000, Wim Hof set the Guinness World Record for thre farthest swim under ice, with a distance of 57.5 metres (188.6 feet).