Tilapia has long been a Filipino staple—an everyday fish that quietly feeds millions, sustains rural livelihoods, and anchors the country’s aquaculture economy. But beyond the Philippines, tilapia has also become one of the world’s most widely consumed freshwater fish, prized for its mild flavor, affordability, and versatility.
Yet one biological limitation has always held it back: tilapia simply does not thrive in cold water. That barrier may soon be overcome.
A groundbreaking international study has found that two common ingredients found in ordinary chewing gum – Arabic gum and lecithin – can significantly improve the ability of Nile tilapia (scientific name: Oreochromis niloticus) to survive and grow in colder climates. The discovery opens the door to raising tilapia in countries far beyond the tropics, potentially reshaping global aquaculture.
The research was conducted by scientists from the Ateneo de Manila University (ADMU), Benha University, and the National Institute of Oceanography and Fisheries in Egypt. Their findings were published in Aquaculture Reports, a peer‑reviewed journal.
“This discovery paves the way for raising tilapia for food outside of the Philippines and other tropical regions where they are commonly farmed,” ADMU said in a statement.
A Tropical Fish
Nile tilapia has been raised for food since ancient times. Native to Africa, it is now farmed across tropical countries such as the Philippines, Thailand, and Indonesia. Its popularity stems from its fast reproduction, efficient feed conversion, and resilience against diseases—traits that have earned it the nickname “aquatic chicken.”
But despite its hardiness, Nile tilapia has one major vulnerability: cold water.
The species flourishes only within a narrow temperature range of 26°C to 30°C. Anything colder slows its metabolism, weakens its immune system, and can eventually lead to death. This sensitivity has prevented tilapia from being farmed widely in temperate countries, where winter temperatures routinely drop below the species’ comfort zone.
Chewing Gum Ingredients
The research team explored whether Arabic gum and lecithin—two ingredients commonly used in chewing gum and other food products—could help tilapia cope with cold stress.
Arabic gum is a natural sap, usually harvested from the Acacia Senegal tree.
Lecithin, meanwhile, is a widely used emulsifier derived from eggs, soybeans, or sunflower seeds. Both are readily available in the Philippines and are already used in feed and food processing.
“The Arabic gum we used was commercially sourced and of feed‑grade quality, similar to the type generally available in the Philippines,” said Dr. Janice Alano Ragaza of ADMU’s Department of Biology, one of the study’s authors.
The researchers prepared specialized fish feed by first determining the nutritional needs of tilapia fingerlings. They calculated the required amounts of protein, fat, and other nutrients, mixed the dry ingredients thoroughly, added wet ingredients to form a dough, pelletized the mixture, dried the pellets, and refrigerated them until use.
Over three months, Nile tilapia fingerlings were fed diets containing varying amounts of Arabic gum and lecithin. The team monitored the fish’s weight, growth, blood chemistry, enzyme levels, and genetic responses.
The results were striking.
Fingerlings fed 4 grams of Arabic gum and 10 grams of lecithin per kilogram of fish food showed significantly improved levels of minerals, enzymes, and antioxidants that help fish withstand cold stress. More importantly, the diet activated specific genes associated with surviving low temperatures.
One such gene is delta‑9 desaturase (Δ9D), which helps maintain cell membrane fluidity in cold environments. In cold‑blooded species like fish, membrane fluidity is essential for normal cellular function. Arabic gum and lecithin appear to influence lipid metabolism in ways that enhance the fish’s ability to adapt to cold conditions.
A Breakthrough
For countries in temperate regions, the study offers a promising solution to a long‑standing challenge.
“Tilapia has become a popular freshwater fish in many temperate countries,” Dr. Ragaza said. “It is affordable, has mild, white meat, and is widely available.”
If tilapia can be raised successfully in colder climates, the technology could be adopted in the United States, Australia, Mexico, China, Israel, Brazil, Japan, and South Africa—all countries where tilapia consumption is already rising.
This could dramatically expand global production, reduce pressure on wild fish stocks, and provide a stable source of protein for millions.
Why Nile Tilapia?
The study focused specifically on Nile tilapia, not other tilapia species, for several reasons.
“Nile tilapia is favored for its faster growth rates, efficient feed conversion, tolerance to various environmental conditions, and strong market demand,” Dr. Ragaza explained.
In Egypt, the species carries deep cultural and historical significance. It has been part of Egyptian life for thousands of years and remains central to the country’s aquaculture industry. Egypt is the largest producer of farmed tilapia in Africa and the third‑largest worldwide.
“Nile tilapia provides an affordable source of protein for millions of Egyptians and supports the livelihoods of many, especially in rural areas,” she added.
Tilapia as an Economic Barometer
In the Philippines, tilapia is the second most important cultured fish, next only to milkfish (bangus). It has even replaced galunggong as an informal economic barometer, reflecting the purchasing power of ordinary Filipinos.
“Filipinos have relied on tilapia as a staple and cheap source of fish protein since it was introduced in the Philippines in the 1950s,” said former agriculture secretary Dr. William D. Dar. “Over the past two decades, we have seen an exponential growth of the tilapia industry.”
Tilapia cages now dot major lakes and rivers across the country—Laguna de Bay, Taal Lake, Lake Sebu, and many others. The fish is cooked in countless Filipino households, whether fried, grilled, stewed in sinigang, or simmered in paksiw.
With climate change threatening water temperatures and weather patterns, innovations that improve tilapia’s resilience are becoming increasingly important.
Climate‑Smart Aquaculture
The study’s findings contribute to a growing body of research aimed at strengthening aquaculture in the face of environmental change.
“Aquaculture scientists are investigating new feed ingredients to enhance the aquaculture and aquafeed industries,” Dr. Ragaza said. “For example, incorporating Arabic gum into fish diets may improve tilapia production in subtropical regions.”
If further trials confirm the effectiveness of Arabic gum and lecithin in real‑world farm conditions, tilapia farming could expand into new territories and become more resilient against cold spells and fluctuating temperatures.
For a fish that feeds millions, supports rural livelihoods, and anchors national economies, this breakthrough is more than a scientific curiosity—it is a potential game‑changer.
