Coast Guard officials are continuing the search for a Canadian filmmaker who was reported missing while diving off the Florida Keys.
Rob Stewart, a native of Toronto, went missing while diving to film sharks in the area near Alligator Reef around 5 p.m. Tuesday, officials said.
"It doesn't look great but we got to believe he's the kind of person who can survive," father Brian Stewart said Wednesday.
Rob and three others had just finished a dive at the wreck of the Queen of Nassau, about 220 feet below the surface.
"Rob has done thousands of dives, dove all over the world with some of the worst equipment," his father said. "This was some of the best state of the art equipment. So something went terribly wrong."
Coast Guard crews were joined by officers from the U.S. Navy, FWC and the Monroe County Sheriff’s Office in the search.
The 37-year-old Stewart is known for his documentary films about the creatures, including his latest project called "Sharkwater 2."
Stewart's family said Sir Richard Branson has donated a plane to help with the search.