|Humboldt Bay - Wikipedia|
The surfer, Jay Scrivner, was paddling on his board while waiting for a wave set when, according to a comment he made to the AP, a shark came 'out of nowhere' and bit his thigh.
Mr. Scrivner saw the teeth and nose of the shark and he took a swing while letting out a yell. The shark released Mr. Scrivner and his board and he was able to paddle to shore.
He received 30 stitches and is expected to make a full recovery.
Photo from Wikipeidia
Surfer Survives Shark Attack Near Humboldt Bay - CBS San Francisco
Surfer bitten by shark near Humboldt Bay expected to fully recover - Los Angeles Times
Shark Attack Surfer: 'Did I Really Get Bit? - Sky News