The four beast Island was one of the 39 southern islands. Among the 39 southern islands, it was obvious that one's strength was in the middle. The reason why this place was called the four beast Island was not because the island controlled the four types of sea beasts, but because there were four huge rocks around the island. These four rocks looked like four wild beasts, hence the name four beast Island.
The island that Zhao Hai and the others appeared on was not far from the four beast Island. If they were to fly, they would be able to reach the main island of the four beast Island in about four hours.
However, when Zhao Hai's Army arrived at the small island, they did not immediately attack the four beast Island. Instead, Zhao Hai sent out a small team to Scout the four beast island's surroundings. The main purpose was to check on the four beast island's defenses and to see if there were many people on the island.
