However the latest update from WA Police is that the surfer is believed to be in his 20s.
Falcon Bay Beach Cafe worker Shaimous Wright told PerthNow how two men came rushing in after 4pm asking for ice, telling him someone’s leg had been bitten off.
“We gave it to them for free, apparently his leg got bitten off,” he told PerthNow.
“They ran in saying ‘we need ice, we need ice, his leg was bitten fully off’.
“We don’t know if they knew him, all we know is that they were just trying to help.”
He said customers and staff were in a state of shock over the incident.
Falcon Bay beach has been closed one kilometre in each direction by City of Mandurah rangers.
The RAC rescue chopper was sent to the scene however paramedics assessed the teenager and the chopper was no longer required. He was transported to hospital by ambulance to Peel Health Campus.
She said paramedics performed CPR on the surfer for about 15 minutes before he was taken by ambulance to hospital.
His injured leg was packed with ice as he was carried on a stretcher to the ambulance.
He was one of about 20 surfers at the popular break on Tuesday afternoon.
Ms Fenner said other surfers had seen a large shark in the area in recent days.
Just before 8am on Tuesday morning a 3.5 metre great white shark was spotted about 1.8km offshore at nearby Pyramids Beach.
But the species of shark involved in the incident is not yet known.
A Fisheries Department spokesman said its officers were aware of the incident and investigating but he was unable to comment further.
Earlier, a SJA spokeswoman said paramedics responded to an incident at Falcon Beach to treat
male teen in a suspected shark attack.
SJA said the man had been taken to hospital on “priority one”, which is an emergency situation.
FATAL SHARK ATTACKS IN WA
● December, 2014: Jay Muscat, 17, was out spear fishing at Cheynes Beach, Albany when he was fatally bitten by a shark.
● March, 2014: Michael “Mick’’ McGregor disappeared while scuba diving from a boat about 5km off Mandurah. His body was found days later with big bite marks but it is unclear if he was killed by the shark, or drowned.
●November 23, 2013: 35-year-old Chris Boyd was killed while surfing the Umbies break off Gracetown.
● July 15, 2012: Surfer Ben Linden, 24, fatally mauled by a great white shark near Wedge Island, north of Perth.
●April 1, 2012: Father-of-two Peter Kurmann, 32, taken by a 4m white pointer shark after a morning dive off Geographe Bay with his brother.
●October 23, 2011: American George Thomas Wainwright, 32, died after a great white attacked him while scuba diving off Rottnest Island.
●October 10, 2011: Perth businessman Bryn Martin, 64, disappeared while swimming off Cottesloe Beach. His shredded swimming costume was later found.
● September 4, 2011: 21-year-old surfer Kyle Burden died in Bunker Bay after his body was ripped in half by a shark.
●August 17, 2010: Nick Edwards, 31, bled to death after being attacked while surfing in Gracetown.
● December 27, 2008: Fisherman Brian Guest, 51, was taken by a shark when he was snorkelling at Port Kennedy in Perth’s south.
●March 19, 2005: Geoffrey Brazier, 26, attacked by a 6m shark, believed to be a great white, as he snorkelled near the Abrolhos Islands, off Geraldton, 500km north of Perth.
● July 10, 2004: Surfer Brad Smith, 29, is attacked by two sharks believed to be a great white and a bronze whaler while surfing a popular reef off Gracetown.
●November 6, 2000: Businessman and father-of-three Ken Crew, 49, died after his leg was torn off by what Fisheries officers believe was a white pointer shark up to 4m long at North Cottesloe beach.