The arrows used for bowfishing are much different from hunting arrows. Instead of wood, aluminum, or carbon, bowfishing arrows are made from heavy fiberglass. The added strength helps when a missed arrow hits a rock or another object in the water.
Points for bowfishing arrows are also much different from hunting points. The point on a bowfishing arrow has barbs, making sure the fish won't get away after being shot. On some points, the tip and the barbs screw off entirely. On others, the tip unscrews slightly and the barbs reverse.
AMS sells a safety slide, so that no snagging can occur.
The line ties onto a circle that can slide up and down the arrow. Before shooting, make sure the slide is toward the front of the arrow, and that the line is coming directly from the reel. Once the fish is hit, the slides comes back down the shaft toward the stopper.
To be sure the stopper doesn't come off, I apply some kind of super glue right on the threads of the screw before screwing it in. This ensures it stays strong for those hard fighting fish!
You could also make your own. Take some wire or strong monofilament line, and run it through the holes in the front of the arrow, down the shaft, and through to holes on towards the nock. Put a 2-way swivel on the line, and tie the ends together. The swivel will slide up and down the arrow as the AMS safety slide does.