an experienced angler casts his fishing line into the calm water below. The hook sinks beneath the surface with its sharp barbed point clearly visible. A curious fish swims toward the baited hook and bites down on it. The barbed point immediately catches inside the fish's mouth, preventing escape. The angler feels the tug on his line and begins reeling in his catch. Other fish scatter away as the hooked fish struggles against the line. how the sharp pointed parts of the hook secure the catch once it bites