Lạc Long Quân decided to offer his help to the people by slaying the fish. He built a huge ship, made a burning human-shaped piece of metal, then sailed straight towards Ngư Tinh's nest. There he held the human-shaped piece of metal up to trick Ngư Tinh. Ngư Tinh thought it was a human, so it opened its mouth and tried to swallow to burning metal. Quân then threw the burning metal into Ngư Tinh's mouth. Ngư Tinh 's throat was burning, it struggled and tried to sink Quân's ship. Quân then took his sword out and slew the beast, slicing it into three pieces.