Wearing nothing except a large smile, a man jumped into the largest exhibit at Ripley's Aquarium of Canada in downtown Toronto late Friday and swam among sharks before security asked him to leave — but it didn't end there. 
 
 One minute-long video posted on YouTube shows the 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. 
 
 The naked man can be seen doing the breaststroke on the surface of the water while sand tiger sharks swim within centimetres of his feet. 
 
 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 at the popular tourist attraction 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, she told CBC Toronto on Monday. 
 
 The man stripped and dove into the Dangerous Lagoon, police say. (thecityissleeping/YouTube) 
 
 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." 
 
 A video by a visitor who captured the man's aquatic adventure has received more than 5,000 views on YouTube. 
 
 On-site security called police, said Sidhu. 
 
 The man got out of the water and evaded security by slipping into a crowd of visitors, a video shows. (thecityissleeping/YouTube) 
 
 But before officers arrived, the man got out of the water. 
 
 A 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 during the stunt, she noted, adding the swim was "extremely dangerous." 
 
 "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. 
 
 Police haven't been able to locate the man, but they are looking to speak to him. 
 
 He could be facing charges of trespassing, mischief and indecent exposure, said Sidhu. 
 
 The aquarium was hosting a monthly Friday Night Jazz event, which has a cash bar and live music until 11 p.m. 
 
 Police have launched an investigation into the tank incident. CBC Toronto has reached out to the aquarium, but hasn't received a response. ||||| A man who skinny-dipped in the shark tank at Ripley’s Aquarium of Canada is wanted for assaulting a man at Medieval Times earlier in the same night, police say. At around 8 p.m. on Friday, a 34-year-old man was randomly assaulted outside of Medieval Times, near Dufferin St. and Saskatchewan Rd. 
 
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 Employees at the venue had apparently asked the suspect to leave for being disruptive, Toronto police Const. Allyson Douglas-Cook told the Star. The suspect later returned and smashed two glass doors, she said. Afterwards, outside the venue, the man allegedly approached the victim who was smoking a cigarette and assaulted him. She said the victim and suspect had no prior contact. 
 
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 “The victim was seriously injured enough to be taken to hospital,” Douglas-Cook said, adding that he had black eyes and a broken tooth. The suspect fled the area after the assault. Later that same evening around 10:30 p.m., police said they received a call about a man who dropped his drawers and jumped into a tank full of sharks at Ripley’s Aquarium. “Further investigation revealed the man involved in both incidents was the same person,” Toronto police said in a press release. On Monday night, Douglas-Cook said police were able to identify the man with help from the public as David Weaver, 37, from Nelson, B.C. 
 
 This naked man swam with the sharks at Ripley's Aquarium of Canada before security escorted him out. ( YouTube ) This naked man swam with the sharks at Ripley's Aquarium of Canada before security escorted him out. ( YouTube ) An online video shows a man swimming with sharks at Ripley’s Aquarium of Canada, doing one final dive before being escorted out. ( Tara Walton / Toronto Star file photo ) Toronto police are searching for this man, David Weaver, who is wanted in connection with two separate incidents that took place on Oct. 12. ( Toronto Police Service ) 
 
 He is wanted for assault causing bodily harm and mischief interfering with property. Security camera footage shows a man entering the aquarium in downtown Toronto shortly after 10 p.m. He bought a ticket before immediately taking off his clothes, climbing over the security barrier and jumping into the water, Ripley’s officials said in a statement. 
 
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 “Ripley’s Aquarium of Canada is co-operating with authorities and is willing to press all appropriate charges once the individual has been apprehended,” the statement read. Videos captured by onlookers show the naked man swimming in the tank as sharks dart by in the water beneath him. As he was climbing out of the tank, in front of the security person who was waving him out, he took a backward dive off the rocks and into the water as people in the crowd cheered. The skinny-dipper then hoisted himself out of the tank, hopped over the gate and headed into the crowd where a woman handed him what appears to be clothing. “There were no injuries to the man, animals or patrons,” police said. Employees brought towels to the man and told him to stay on-site until the police arrived, said Derek Marlow, who saw the stunt. “Once he got his clothes back on, he and his girlfriend walked right out of the aquarium despite security staff yelling at him to wait for police and get back in this small holding room they wanted to keep him in,” Marlow told the Star. His friends saw the man at Union Station later, Marlow said. Police described Weaver as 35-40 years old, five-foot-ten and 220 pounds. He has a shaved head, a dark goatee, a tattoo on his lower leg and is missing a front tooth. He was last seen wearing a dark hoodie, dark jeans, a green teal T-shirt, and grey and white shoes. Police say he may be be driving a green Dodge Caravan with the British Columbia license plate number PL120G. Anyone with information is asked to contact police at 416-808-5200 or call Crime Stoppers anonymously at 416-222-TIPS (8477). Stefanie Marotta is a breaking news reporter, working out of the Star’s radio room in Toronto. Follow her on Twitter: @StefanieMarotta Claire Floody is a breaking news reporter, working out of the Star’s radio room in Toronto. Follow her on Twitter: @claire_floody ||||| Over the weekend, 38-year-old Anthony Shannon was caught on surveillance camera grabbing “Miss Helen” the horn shark from the San Antonio Aquarium and taking off with her in a baby stroller. 
 
 "After everything happened, I told [the police] everything," Shannon said. "I was honest with them straight." 
 
 Shannon was one of three people who took off with the animal. Leon Valley police say that Shannon eventually confessed to the crime and was charged with felony theft. 
 
 RELATED: SA Aquarium theft: Shark returned safely 
 
 "It was wrong to just take him like that. But, at that point in time, it was just something that I had to do," said Shannon, a self-proclaimed activist who says that he has 30 years of personal experience with marine life. 
 
 In his home, he has three salt water tanks filled with dozens of fish and five sharks. 
 
 "I've been dealing with aquariums since I was 8 years old," said Shannon, who described placing the stolen horn shark in one of his tanks until police later recovered it. "I knew it would gain a lot of strength being in a proper environment.” 
 
 Shannon said that about four weeks ago, a friend told him the San Antonio Aquarium was in poor condition and marine life were dying frequently. 
 
 "So I said, as a salt distributor, I was going to send in a guy, 'Anthony Shannon,' that he's my buddy, he's an aquarist in San Antonio. So when I came, I posed as myself, I got a full tour of the store," Shannon recalled. "She showed me everything, and the room, and ‘check out the systems.’" 
 
 RELATED: Shark heist suspect may have posed as supplier to stake out SA Aquarium 
 
 The General Manager of the San Antonio Aquarium sent this statement on Wednesday: 
 
 About a month ago Anthony Shannon posed as an employee of Instant Ocean, the company from where we get our marine salts. He stated that we may have been sold a bad batch of salts and he needed to do water quality testing to make sure we were not putting our animals in danger. We have a good working relationship with Instant Ocean and had no reason to doubt his story until he was recognized on camera after the theft by the employee that led him to various back areas to do the testing. 
 
 Any deceased animals he may have seen while in our back areas were an unfortunate part of being in this business. We take the best possible care of our animals throughout their lives, which unfortunately do end eventually. A giant pacific octopus only lives for about 3 years and are rarely acquired as babies, giving us only a short time with these amazing creatures. 
 
 Part of taking great care of animals is giving them the best possible diet, full of vitamins and the nutrients they need to survive. Many of our aquatic animals eat things such as krill and capelin, which can be somewhat oily. This oil can cause a slight sheen on the water after a feeding. Our filtration systems clean this out pretty quickly but it takes a few minutes to completely clear the water. 
 
 We do daily tests of our water throughout the aquarium and show that everything is within normal parameters on the day Helen went missing. 
 
 We appreciate all of the love and support everyone has shown for Helen and invite everyone to come see her when she's back on exhibit. 
 
 Shannon claims that on Saturday, when he was visiting the aquarium, he sat for an hour as children and their families played with the animals then saw a shark in distress. 
 
 RELATED: Take a look inside the home of the man accused of stealing a shark 
 
 "Then I pulled the net out, I told the customers to get out of the way, ‘I'm going to quarantine the shark,’" Shannon described. "I'm an activist, not a criminal, and basically I don't want to produce any crimes that will make me lose my family or big charges and to open an eye and make things better." 
 
 Shannon was charged with felony theft of property valued at $2,500 to less than $30,000 for the heist but claims that the horn shark is worth, at most, $800. 
 
 An online petition on Care2.com asking the the aquarium to close its touch pool has over 15,000 signatures. The petition came about after the shark was taken from the pool. The petition claims that touch pools are "stressful for animals" and can cause injury or death to the sea life. The petition asks the San Antonio Aquarium to close the interactive touch pool on the premise that guests don't need to be able to touch the animals to appreciate them. For more information on that petition, click here. 
 
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– "I was scared I was going to witness the death of this guy": That's what one visitor had to say after a man decided to go skinny dipping with the sharks at Ripley's Aquarium of Canada. The man stripped down and then went over a security barrier and jumped, completely naked, into the Toronto aquarium's largest exhibit Friday night. It's called the "Dangerous Lagoon," and a spokesperson for Toronto Police Service tells the CBC the man's stunt was, in fact, "extremely dangerous" to him, the marine animals in the tank, and the staff that tried to get him out of the water. The aquarium was open late at the time for its Friday Night Jazz program. Security personnel asked the swimmer to exit the water but he instead swam to the edge, got out, then did a backward flip right back in. "The guy seemed totally relaxed and there were sharks like everywhere," the aforementioned witness notes. Eventually, the man did get out, put his clothes back on, and slipped into a crowd of onlookers. Security had called police, but the man was gone by the time they arrived; they are currently investigating the incident. They want to speak to the man, and the police rep says he could face charges including trespassing, mischief, and indecent exposure. The aquarium says it will press charges if the man is found, the Toronto Star reports. (This shark likes the taste of plants more than meat.)