By Kenneth Marcos 
In the quiet brackishwater ponds of Lala, Lanao del Norte, fish farmers watch the water closely as small ripples move across the surface. Beneath the water, two species are growing side by side—giant freshwater prawns and red tilapia. While both are familiar to many aquaculture producers, the way they are being raised together in this environment could open new opportunities for coastal communities.
Researchers from the National Fisheries Research and Development Institute’s Brackishwater Fisheries Research and Development Center are currently conducting an innovative aquaculture experiment that combines ulang, also known as giant freshwater prawn, and red tilapia in a single culture system. The project is taking place in brackishwater ponds in Lala, Lanao del Norte, marking the first known grow-out culture of these two species together in such conditions.
Polyculture, the practice of raising more than one species in the same pond, is not new in aquaculture. Farmers and researchers have long recognized its benefits, particularly in maximizing pond productivity and improving farm income. However, the current study stands out because it tests the compatibility of giant freshwater prawns and red tilapia in brackishwater environments, which are common in many coastal parts of the Philippines.
The experiment may seem simple, but its potential impact is significant. Giant freshwater prawns are known for their high market value and strong demand in local and international markets. Tilapia, on the other hand, is widely farmed in the Philippines because it grows fast, adapts well to different environments, and remains affordable for consumers.
By combining the two species in one production system, researchers aim to improve the efficiency of fish farming while helping farmers earn more from the same pond area. In polyculture systems, different species use different parts of the pond ecosystem, which reduces competition for food and space. This can lead to better overall growth and higher yields compared to single-species farming.
The brackishwater setting is also important. Many coastal areas in the Philippines have ponds that contain a mix of fresh and salt water. These areas are often used for milkfish or shrimp farming. If the polyculture of ulang and tilapia proves successful in brackishwater conditions, it could provide farmers with another viable option for diversifying their production.
According to fisheries experts, diversification is becoming increasingly important in aquaculture. Climate change, disease outbreaks, and fluctuating market prices continue to challenge fish farmers across the country. Introducing new culture systems can help reduce risks and create more stable sources of income.
The Philippines remains one of the leading producers of tilapia in Southeast Asia, and the species plays a major role in the country’s food security. Meanwhile, giant freshwater prawns are considered a premium product that can command higher prices in the market. Combining the strengths of these two species may help farmers balance affordability for consumers while also improving profitability.
The research project by the Brackishwater Fisheries Research and Development Center is part of broader efforts by the fisheries sector to modernize aquaculture and support coastal livelihoods. By testing innovative techniques and sharing the results with local farmers, researchers hope to create practical solutions that can be applied in communities across the country.
For coastal families who rely on fish farming as their main source of income, innovations like this could make a real difference. If successful, the ulang and tilapia polyculture system may offer a smarter way to produce food, increase farm productivity, and strengthen the resilience of Philippine aquaculture.
As the study continues, many in the fisheries sector are watching closely. The results may help shape future aquaculture practices and provide new opportunities for farmers living along the country’s vast coastal areas.
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