Coral reefs are home to many kinds of fish, and each species plays a different role in the ecosystem. Watching which fish are present helps scientists understand how healthy a reef may be.

The reef floor is made up of different surfaces, such as live coral, sand, rock, and algae. Studying this substrate helps show what kinds of habitats are available for marine life.

Waves, tides, and currents constantly move water across the reef. This movement brings oxygen and nutrients, but it can also carry sediment that affects reef health.

Underwater surveys record fish, coral, and reef conditions at specific sites. Repeating these surveys over time helps scientists detect changes, track reef health, and identify areas that may need protection.

Traditional Hawaiian fishponds use carefully built rock walls to shape and protect the habitat. These walls help manage water flow while creating a place where fish can grow.

Mākāhā, or sluice gates, control how water moves in and out of the fishpond. At Heʻeia, some gates bring in salt water from the ocean while others regulate fresh water from the stream. Together, they create the brackish conditions that help limu grow and support fish, turning the pond into a carefully managed food-producing ecosystem.

A fishpond provides shelter, food, and nursery space for aquatic species. It shows how a well-designed habitat can support both nature and community needs.

Fishpond restoration brings people together to care for land, water, and culture. Through hands-on work, communities help protect an important ecosystem for future generations.

Native wetland plants help hold soil in place, filter water, and provide habitat for wildlife. They are an important part of keeping wetlands healthy and balanced.

Working in the loʻi and harvesting kalo showed us how conservation can also sustain a community. Caring for the land helps kalo grow, and the kalo in turn provides food, making people part of the cycle rather than separate from it.

Growing kalo is a cycle of care. Healthy wetlands help kalo grow, while tending the loʻi helps care for the land and water. The kalo is then harvested as food, connecting people back to the ʻāina that sustains them.

What happens on land eventually reaches the ocean. Restored wetlands and kalo fields can help slow and filter runoff, keeping excess sediment from flowing downstream and helping protect coastal ecosystems.