A man who allegedly provoked a shark before he was bitten off the coast of Western Australia was filmed jumping onto a hammerhead for fun six years earlier. Aaron Moir, who calls himself the 'Shark Rider', was bitten by a three-and-a-half metre lemon shark while working as a skipper on a charter boat near Varanus Island, 120km west of Karratha, at 8pm on Tuesday night. Panicked boat crew sailed to Exmouth before the 32-year-old was treated by paramedics for back and leg injuries and taken to Royal Perth Hospital in a lengthy ordeal that lasted 10 hours. He is now being investigated by the Department of Fisheries, the Australian Maritime Safety Authority and WorkSafe over claims he provoked the animal.