A man who swam naked among sharks at Ripley's Aquarium of Canada in downtown Toronto late Friday is wanted in connection with a violent assault earlier in the evening, police say.

Police have identified him as David Weaver, 37, of Nelson, B.C. He is wanted for assault causing bodily harm.

He is believed to be driving a green Dodge Caravan with the B.C. licence plate PL120G. Police say he is five-foot, 10 inches tall, about 220 pounds, with a heavy build. He has a shaved head, goatee and missing teeth.

Police spokesperson Katrina Arrogante said investigators from the city's west-end 14 Division and the downtown 52 Division connected the incidents on Monday.

Police are looking for David Weaver, 37, of Nelson, B.C., described as five-foot, 10 inches tall, about 220 pounds with a heavy build. He has a shaved head, goatee and missing teeth. (Toronto Police Service)

The assault took place outside the Medieval Times attraction at Exhibition Place around 8 p.m. ET Friday, and the victim suffered serious injuries, police said. It's believed the assailant fled and headed to the aquarium, around five kilometres east. Officers were called to the popular tourist attraction two hours later.

A minute-long video, shot at the aquarium and posted on YouTube, shows a man taking off his clothes and diving into the Dangerous Lagoon, a 2.9-million-litre tank that offers an underwater gallery to dozens of marine animals, including 17 sharks.

The man can be seen doing the breaststroke on the surface of the water while sand tiger sharks swim within centimetres of his feet.

I was scared I was going to witness the death of this guy. - Erinn Acland , witness

Green sawfish, green sea turtles, green moray eels and other species of tropical fish are also housed in the tank, according to the aquarium's website.

Security personnel asked the man to leave shortly before 10:30 p.m. ET but he refused, said Jenifferjit Sidhu, a spokesperson for Toronto Police Service.

Instead, he swam to the edge of the enclosure and emerged from the tank before doing a backward flip into the water. Police were called.

A nude swimmer dove into the shark tank in Toronto’s Ripley’s Aquarium. No marine animals were harmed, but Toronto Police said the stunt was "extremely dangerous." 0:55

Visitor Erinn Acland said she heard the "big splash" and thought the trainers were feeding the sharks. As Acland and her boyfriend approached it, she said, they saw a man in the water.

"The guy seemed totally relaxed and there were sharks, like, everywhere," she told CBC Toronto. "He appeared to be totally nude and, like, laughing."

Acland described the display as unexpected and horrifying.

"I don't know what would possess someone to do that. It's totally insane to me," she explained.

"I was scared I was going to witness the death of this guy."

The man stripped and dove into the Dangerous Lagoon, police say, swimming with sand tiger sharks, sawfish and moray eels. (thecityissleeping/YouTube)

But before officers arrived, the man got out of the water.

The video shows him walking past security standing on the edge of the tank, jump the gate and slip into a crowd of onlookers where a woman appears to be holding his clothes. He put them on and left the aquarium at the request of security, Sidhu said.

No marine animals were harmed, she said, while adding that the stunt was "extremely dangerous."

We plan to press charges to the full extent of the law. — Peter Doyle, general manager of Ripley's Aquarium

"It put the man's safety in jeopardy, the safety of the marine animals and the safety of the staff who tried to get him out of the water," she told CBC Toronto.

The aquarium plans to press charges, said general manager Peter Doyle.

"It's very dangerous for both the individual as well as our animals," he told CBC Toronto.

"An animal's health and welfare is paramount to what we do so… we plan to press charges to the full extent of the law."

The video shows the man initially evaded security by slipping into a crowd, but he was later apprehended and asked to leave. (thecityissleeping/YouTube)

Though the animals ignored the man, they are unpredictable, Doyle said.

"Whenever you jump in with wild animals — whether you scare a dog, you scare a shark — it can be very serious," he said.

Doyle said the incident was the first of its kind in the five years since the aquarium opened.

The aquarium was hosting a monthly Friday night jazz event, which has a cash bar and live music until 11 p.m.