This experiment was repeated several dozen times over the next few weeks. Each time, the shark got less aggressive and made fewer attempts to attack the bait fish, until eventually the shark got tired of hitting the fiberglass divider and simply stopped attacking altogether.
The marine biologist then removed the fiberglass divider, but the shark didn’t attack. The shark was trained to believe a barrier existed between it and the bait fish, so the bait fish swam wherever they wished, free from harm.