Workers at the East Java processing plant of Indonesian seafood supplier Bahari Biru Nusantara race every day to gut, fillet and freeze prized wild-caught fish for the world market.
Company director Hadi Wijaja says they can process 35 tonnes of fish a day, or 5,000 tonnes a year, inside the spacious facilities whose sanitary practices are registered internationally - including in the US, the EU, and Korea, where fish must reach while still fresh enough to be consumed raw.
Indonesia is the world's largest producer of tuna, with an annual catch worth an estimated US$5 billion (S$6.8 billion).
Roughly one in six tuna caught worldwide over the past three years came from Indonesia, which accounted for 16 per cent of world tuna production last year, director general of capture fisheries Zulficar Mochtar reported last month.
Its largest market is the United States, which consumed nearly half of Indonesia's tuna catch last year, mostly as frozen whole fish or fillets. Indonesia's tuna exports to the US have soared 130 per cent since 2014.
Japan, which introduced sushi to the world, imported nearly a quarter of Indonesia's tuna last year. The rest went mainly to Australia, Hong Kong, Singapore and South Korea.
Indonesian seafood suppliers are out in force this week at Seafood Expo North America 2019, the continent's largest seafood trade fair.
Bahari Biru Nusantara and about 20 other suppliers will be there to raise Indonesia's visibility as the world's top producer of high-quality tuna, and to satisfy potential customers with concerns about dwindling fish stocks, overfishing and damage to the ocean environment.
Increasingly, diners all over the world want to know where their fish comes from and how it was caught.
"Demand for responsibly sourced seafood has grown in markets all over the world," says Jeremy Crawford, Southeast Asia director for the International Pole and Line Foundation, a non-governmental organisation promoting sustainable fisheries.
For some years now, Indonesia has been working to reassure its customers by making the workings of its seafood supply chains more transparent.
With an estimated 3.3 million people employed in the sector, it has had to combat perceptions of poor labour practices, human trafficking, and rampant illegal fishing in the western Pacific.
Under outspoken Minister of Marine Affairs and Fisheries Susi Pudjiastuti, Indonesia was the first fishing nation to make public real-time data on the location of all vessels in its waters.
Introducing that system made it a global leader in terms of transparency, says Amanda Shaver, environmental security specialist at Washington DC-based think tank the Stimson Centre.
Under Susi's watch, hundreds of foreign fishing boats caught fishing illegally in Indonesian waters have been sunk, often by theatrical explosions.
The visible crackdown has boosted Indonesia's reputation for transparent fishing supply and zero tolerance of illegal practices.
The country has also developed a modern and efficient processing industry to cope with the volume of fish that is caught.