He was naked — and totally unafraid — as he was surrounded by sharks.
The bizarre occurrence unfolded Friday at the "Dangerous Lagoon" exhibit at Ripley’s Aquarium in Toronto.
Video from the shocking incident clip shows the man removing all his clothes before jumping into the tank, which contained sand tiger sharks and menacing-looking sawfish.
“Oh my gosh!” an onlooker is heard saying in the video as the sea predators swim right by him.
The nude swimmer then appears to have a little trouble finding his way out of the tank. He swims across the tank and climbs out, but not before doing a back dive.
Video of the incident was shot by Emma McGinn, who told Inside Edition: "It was definitely shock right away. We just couldn’t believe he was swimming with sharks and he didn’t have trunks on."
The naked man, identified as 37-year-old David Weaver, is now being sought by police.
He is also wanted for questioning in an assault case.