In late January 2017, Stewart was in Florida filming
Sharkwater Extinction, a sequel to
Sharkwater. On January 31, he and his dive partner resurfaced from a deep wreck dive of the
Queen of Nassau. His dive leader Peter Sotis fell unconscious while boarding the crew's boat, and as the ship team rushed to provide assistance, Stewart, who was still in the water, vanished.
Paul Watson, a marine wildlife conservation and environmental activist and friend of Stewart, noted that he had been using a
rebreather, which could have rendered him unconscious as well. A search was launched, and on February 3, the
United States Coast Guard located Stewart's body in the water approximately down, close to where he disappeared. His funeral was held at
Bloor Street United Church in Toronto on February 18, 2017. Released months later, the autopsy report from the Monroe County medical examiner said he died from drowning after falling to
hypoxia at the surface of the ocean. In spring 2017, Stewart's family filed a wrongful death lawsuit, alleging it was caused by the negligence of the dive operators who provided equipment that did not meet US safety standards and left him in the water without a dive leader. == Legacy ==