While on the way to get the bananas, Mako and Alfa were in the ocean when Mako thought he saw a dorsal fin in the water. He thought it was Tupa but it was just the coral. He picked up his spear and practiced in the air stabbing the coral in the eye.
When Mako and Alfa got on the land again, Alfa took off running after a wild pig. Mako decided to also get some oranges while he was there. He got out his spear and made a basket to carry the oranges so that they wouldn't bruise. By the time he was done with the basket, it was dark. He called Afa because it was time to go.
As Mako and Afa were on the way home Mako told Tupa "HO, Tupa! It's too late tonight to teach you your lesson".
Then Mako saw him! He saw Tupa!! Mako tried to keep calm. Them Afa went crazy running from the front of the boat to the back of boat.
Mako tried to calm Afa down, but then Afa fell out of the canoe and started to swim toward shore. Tupa noticed that the dog had fallen out of the canoe. Mako throws his spear and then hits the shark in the eye. Then Alfa swims back to the canoe. When Alfa gets on board, Mako throws another spear and now Tupa is blind.
Mako throws his last spear at the shark and hit Tupa's shoulder and finally the shark is dead. Mako brings back the dead body of the shark. He got his revenge on the shark and his reward.