Swimming and Diving
Andrea Vergani, 21, has been provisionally suspended after failing a test during the Italian national championships earlier this month.
Witnesses at Ripley's Aquarium of Canada said the man seemed "totally relaxed" during his swim with sharks.
Clark Kent Apuada now has his sights set on the Olympics.
Yane Petkov swam 3,380 meters with his hands and feet tied while fully wrapped inside a sack.