A Florida beachgoer was bitten by a shark, prompting a dramatic rescue on Thursday afternoon. The swimmer was enjoying himself at the Grayton Beach State Park when the beast approached him and bit his upper body, the South Walton Fire District (SWFD) said on Twitter. The shark in question is probably 7-8 feet in length. A lifeguard on the scene rushed to the victim, who was hurt visibly in his upper body and chest. He was transported to a nearby hospital to be treated further. The victim is expected to recover and is believed to be in a stable condition, the SWFD said.  He was apparently swimming near a fishing line 40 yards away from the shore “The shark approached heading for the line and mistakenly bit the swimmer,” the SWFD stated. As a beach safety alert, double red flags were flown for an hour after the incident. Shark Attack …