The Secret of Crescent Coral - S1.E8

A secret base. In order to resist their terrible enemy, Nambu thinks about a base for the Science Ninja Team. But fearing enemy intervention, he gives the Ninja Team orders to fly a patrol at Point G in the southern Pacific Ocean. Following orders not to intervene there, the God Phoenix leaves a smoke screen and flees when it encounters a sea anemone mecha. That night, Jinpei is with the other four team members, but he is not tired at all. He takes the G-4 and dives to the bottom of the sea. Children in the park had told him that G-4's popularity is the lowest of all the team members, and he intends on gaining their favour by being the best.

Despite the worries of the other team members, he wanders around the sea bottom searching for the mecha. He never notices that he is being tailed by the mecha he seeks.

Jinpei finds what seems to be a base under construction, but is caught by the mecha. He contacts Ken, but the base is blown up before his eyes. The mecha is destroyed by the God Phoenix and Katse gets away again.

Jinpei wails that the base has been blown up because of his own egoistic actions, but Nambu tells him that the destroyed base was only a decoy. The Science Ninja Team had been the bait to attract the enemy's attention.

The God Phoenix is flying high in the sky. Deep below stretches a crescent shaped coral reef. Below the reef hides the base which is capable of changing its location.