When began diving in the 1970s, shotgun shell “bangsticks” were still carried by some divers.

MOMENT OF TOOTH – New York Post.

During the underwater struggle, Clasen speared the shark seven times and even attempted to drown it before finishing it off with a long-blade knife. It wasn’t clear how often Clasen had to resurface to breathe. “Once I shot it in the gills I felt a moral obligation to finish the job,” he said. “In the end we put a knife in its skull.”