McDonald's use premium-quality fresh Tilapia , farmed in Indonesian freshwater

From Lent to Aquaculture: The Global Evolution of McDonald’s Filet-O-Fish

WORLDWIDE
Thursday, January 15, 2026, 00:10 (GMT + 9)

From religious tradition in Cincinnati to tilapia innovation in Indonesia, the fast-food giant is redefining its global fish supply chain

The Origin: A 1962 Solution for Lent

The Filet-O-Fish, one of McDonald’s longest-standing menu items, was born out of a specific economic and religious necessity. In 1962, franchisee Lou Groen created the sandwich at his restaurant in Cincinnati, Ohio, to save his business. At the time, his Catholic customers abstained from eating red meat on Fridays during Lent, causing hamburger sales to plummet. After winning a market test against a pineapple-based "Hula Burger" proposed by Ray Kroc, the Filet-O-Fish officially joined the permanent national menu in 1965.

Why Alaska Pollock Dominates the West

Since the mid-20th century, McDonald’s has refined its sourcing to balance cost and environmental impact. While the recipe originally used halibut and later cod, increasing pressure on marine populations led to a strategic shift.

• Sustainability Standards: Since 2013, the chain has maintained that 99% of the fish used in the Filet-O-Fish comes from sustainably managed wild fisheries.

• Certified Sourcing: In the United States, 100% of the fish is Alaska Pollock certified by the Marine Stewardship Council (MSC).

• Industrial Efficiency: Alaska Pollock is preferred for its high reproductive rates, mild flavor, and its ability to maintain a consistent global supply chain for products ranging from fish sticks to surimi.

The 'classic' Alaska Pollock File-O-Fish

Market Impact and Sales Figures

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• Annual Sales: Approximately 300 million Filet-O-Fish sandwiches are sold globally every year.

• The Lenten Spike: Roughly 25% of the product's total annual sales occur during the Lenten season.

• Industrial Volume: Based on a standard 100g patty, it is estimated that McDonald’s processes over 30,000 tons of fish annually for this single menu item.

The Tilapia version developed in Indonesia

Indonesia and the Shift to Tilapia

While most international markets rely on cold-water whitefish like Pollock or Hoki, McDonald’s Indonesia has adopted a localized strategy. According to official company data, the local "Fish Fillet Burger" is made with high-quality, locally farmed Tilapia (ikan nila).

Through her social media, content creator Rista Anggarini tested the flavor of local tilapia in the Indonesian version of Filet-O-Fish.-->

This regional adaptation highlights a shift toward freshwater aquaculture:

1. Local Abundance: Tilapia is widely farmed and consumed throughout Indonesia.

2. Efficient Growth: As a fast-growing species with a neutral flavor profile, it meets the strict consistency standards required by McDonald’s.

3. Supply Chain Optimization: Utilizing local Tilapia reduces reliance on expensive imported marine species.

Future Potential: Brazil and Africa

The success in Indonesia suggests an untapped opportunity for McDonald’s to diversify its menu in other emerging markets. Tilapia is already extensively farmed in Brazil and several African nations, offering several strategic advantages:

Industry analysts suggest that Tilapia could soon become the primary ingredient for fish sandwiches in new territories, allowing global chains to optimize logistics and reduce their carbon footprint.

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