Kuapā Pond, also known as Keahupuaomaunalua (“the shrine of the baby mullet at Maunalua”) was once the largest loko kuapā on O‘ahu, estimated at approximately 523-acres. Kuapā Pond was apparently created near the end of the ice age, when the rising sea level caused the shoreline to retreat and partial erosion of the headlands adjacent to the bay formed sediment that accreted to form a barrier beach at the mouth of the pond, creating a lagoon.
Early Hawaiians used the natural lagoon as a fishpond and reinforced the natural sandbar with stone walls. Kuapā literally means “wall of a fish pond” and a loko kuapā is one type of fishpond made by building a wall on a reef. The wall at this fishpond was about 5,000 feet long. One of the main harvests was mullet because the combination of freshwater and shallow sand or mud flats that the ponds created were ideal for growing the algae that mullet fed off of.