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The Ancient Art of Hawaiian Aquaculture
Written by a Cultural Expert
Leilani AkoThe central truth of Kaloko-Honokōhau, the secret that allowed life to flourish on this sun-scorched lava, is wai. The Hawaiian proverb, "Ola i ka wai," means "Water is life," and here, that is no mere metaphor. While the land appears arid, a hidden network of freshwater flows from the mountain underground, mixing with the salt water in coastal pools and ponds. This precious resource was the lifeblood of the settlement.
The ancient Hawaiians, with a deep, scientific understanding of their environment, harnessed this water to create one of the most complex aquaculture systems in the Pacific: the loko iʻa, or fishponds. This park is unique—the only one in the national park system that preserves three distinct types of these aquatic marvels. Each is a testament to Hawaiian ingenuity. They are not simply ruins but living classrooms of sustainable engineering.
This park is unique—the only one in the national park system that preserves three distinct types of fishponds. Each is a testament to Hawaiian ingenuity. They are not simply ruins but living classrooms of sustainable engineering.
At the northern end of the park lies Kaloko Fishpond, a breathtaking feat of engineering. The name Kaloko itself simply means "the pond." Here, our ancestors built a colossal kuapā across a natural ocean bay, transforming it into a vast, 11- to 17-acre fish farm. This wall stretches for nearly 800 feet and stands over six feet high and up to 40 feet wide. It was constructed entirely of lava rock without any mortar.
The genius is in the design. The stones of the kuapā were not stacked vertically but at a precise angle. This allowed the wall to absorb and diffuse the immense power of the ocean waves rather than fight against it—a design far superior to many modern concrete seawalls. The porous lava rock also allowed seawater to circulate, keeping the pond healthy. This structure was a living, breathing barrier between the wild ocean and the controlled nursery within.
The purpose of this loko kuapā was not just to hold fish, but to fatten them. The pond keepers were essentially aquatic ranchers, cultivating specific types of algae on the pond floor as a rich pasture for prized fish like ʻamaʻama and ʻawa. At openings in the wall, they placed ingenious gates called mākāhā. These grates had slats wide enough for small, juvenile fish to swim in from the ocean but too narrow for the large, fattened fish to escape. It was a perfect, sustainable system of food production, a reliable source of protein for the entire community.
This physical marvel is also a spiritual one. Moʻolelo tell of a moʻo, a powerful water-dwelling guardian spirit, who rests on a rock and watches over Kaloko, ensuring its bounty. Another spirit, Kumakapuʻu, is said to sit upon the great seawall, protecting the life within. The construction of the pond was an act of engineering, but its success was an act of balance between the physical and spiritual worlds.
Loko kuapā - massive 800-foot seawall creates 11-17 acre fish farm with ingenious mākāhā gates.
Loko puʻuone - 30-acre natural pond behind sand dunes, largest on Kona Coast, now critical bird sanctuary.
1.7-acre tidal trap with low walls - fish swim in at high tide, get caught when tide recedes.
Discover how an ancient community thrived on these lava fields and left their stories in stone.
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To the south lies ʻAimakapā Fishpond, the largest on the Kona Coast at roughly 30 acres. This is a different type of pond, a loko puʻuone, which was formed naturally behind a wide berm of sand that ran parallel to the shore. Rather than building a massive wall, the people here worked with the existing landscape. They enhanced what nature provided by digging a channel through the dunes to the ocean, allowing for the vital circulation of salt water and the entry of young fish. This pond, which was actively used for aquaculture until the 1950s, is now a critical wetland sanctuary for endangered native birds.
At the southern edge of the park, you'll find the ʻAiʻōpio Fishtrap. Unlike the fishponds, which were for raising fish, this 1.7-acre enclosure was designed for catching them. At high tide, fish would swim over the low stone walls or through a small channel into the trap. When the tide receded, the fish were caught inside, unable to escape. They could then be easily netted and kept fresh in smaller walled pens along the shore until they were needed.
Together, these three loko iʻa tell a story of deep intelligence. They show a people who did not impose their will upon the land but listened to it, observed its rhythms, and worked in partnership with it. They understood hydrology, marine biology, and engineering, and they wove this knowledge together with a spiritual reverence for the natural world.
Learn how hundreds of people lived and thrived in this seemingly harsh landscape, creating a complex society guided by the principle "He aliʻi ka ʻāina" - The land is a chief.
Explore the Ancient CommunityHeavenly Hawaiian Coffee Farm • Farm • Holualoa, Island of Hawaii • Hawaii