In ancient times, the ponds on the royal grounds were used to keep fish such as moi and mullet that were eaten by the chiefs. In recent times, tilapia have been introduced into the ponds for mosquito control. However, the park is in the process of removing these non-native fishes that are not naturally a part of our Hawaiian ecosystem.

The tidal pools within the park hold a colorful array of native tropical fish. Watch them swimming among the coral, pausing to graze on seaweed or resting on the tide pool bottom.