According to AFP, the incident occurred at about 9:45 am on September 14 (local time) at Glenfield beach, more than 400km north of Perth city, Western Australia.
The state government and local ambulances said that the man in his 50s was taken to the hospital in a serious condition but vital signs were stable, not life-threatening.
Authorities advise people to be cautious when coming to the beach area.
Australian scientists believe that as the sea area becomes more crowded and ocean temperatures continue to rise, shark migration patterns may change, thereby contributing to an increase in the number of attacks.
Previously, in January, a 12-year-old boy died after being bitten by a shark while swimming at Sydney Harbour. In May and June, three divers also died in separate shark attacks, including two in Western Australia and the other in Queensland.
Also in June, a female teacher was attacked by a shark at a famous beach in Sydney. The victim recounted that she tried to resist by punching the shark before being dragged into the water. After the incident, she had to undergo an artificial coma and surgery to remove part of her left arm.
According to the database of shark attacks on humans, Australia recorded about 1,300 cases since 1791, of which more than 260 caused victims to die.
