Warren Sapp likes to fish, but Wednesday he learned what the bait feels like.The retired Bucs defensive tackle, a regular on South Florida's Two Conchs charter boat, was bitten in the left arm by a shark while diving for lobster out of Marathon in the Florida Keys."I was sticking my hand in a hole and a monster locked on me," Sapp said. "You've got to be careful sticking your hand in some holes down here."It went past the white meat, up to the gristle." Sapp, 43, was out with charter captain Jack Carlson on Florida Bay, about 7 miles out from Marathon in 9 feet of water. Carlson said those on the excursion thought Sapp encountered a nurse shark, about 4 feet long."The shark wanted the lobster just as bad as Sapp," Carlson wrote on Instagram with a photo of a gash in Sapp's arm and the hashtag #epicbattle. "Sapp got the lobster and the Shark got his lick in too."Sapp said the crew wrapped his arm in duct tape and the expedition continued. He was told it might take four stitches."He lit me up," Sapp said. "He got me all the way through the shirt. If the shirt had been a little further down, it might have protected me."Sapp said he would be fine."It was me and the shark, one on one," he said. "Then he put those razor sharp teeth in me and I knew who was the boss. Holy smokes. I snapped my arm, spit the respirator out and went for the surface."