There's no way of telling which shark or sharks were involved without opening them up.
So is there any point to this killing, and is it the way we should treat an endangered species?
Surfing groups traditionally reject any suggestion of killing sharks but after recent attacks, some are changing their mind.
Michael Mackenzie speaks with Brett Merifield, WA champion long boarder from Dunsborough; Tony Cappelluti, Department of Fisheries WA Regional Manager Metropolitan (Perth); Ryan Kempster, marine neuroecologist at University of Western Australia