A California surfer was viciously attacked by a shark in ocean waters Saturday ... and the bite was so bad, authorities say the animal ripped TEN teeth marks into the man's leg.
The attack went down at Gray Whale Cove State Beach in San Mateo County near S.F. ... when authorities say a white shark, approximately 6-to-8 feet long, bit into the 39-year-old surfer.
"The patient suffered severe injuries," fire official Brian Ham told KTVU, adding, thankfully, bystanders were able to bring the surfer to shore just after the attack.