The Kwai River in Kanchanaburi, Thailand, is more than just a scenic waterway—it carries legends passed down for generations. One of the most fascinating stories is that of the Thai Yisok fish, a majestic freshwater species once abundant in these waters. With its shimmering silver-and-gold body, this fish was revered not only for its beauty but also for its deep cultural and ecological significance.

The Myth and Majesty of the Thai Yisok
Long ago, when the Kwai River was pristine and full of life, fishermen in Kanchanaburi often saw Thai Yisok fish gliding gracefully through the currents. Their elegant movements and radiant scales caught the sunlight, making them look like living jewels of the river.
According to local folklore, the Thai Yisok fish was no ordinary fish—it was considered a sacred guardian of the river, symbolizing prosperity and balance in nature. Spotting one was seen as a sign of good fortune, and catching one was a rare blessing. However, these fish were known for their strength and resilience, making them incredibly difficult to catch. Many local fishermen, out of respect for the river’s harmony, would release them back into the water, believing they brought abundance and luck.
The Decline of the Thai Yisok Fish and Conservation Efforts
Over time, Kanchanaburi changed, and so did the fate of the Thai Yisok Fish. Dam construction disrupted their migration patterns, and overfishing caused their numbers to dwindle. Today, it is rare to see this legendary fish in its natural habitat. Elders in local communities still recall the days when Thai Yisok fish leaped from the river, a sight that has now become a distant memory.
But the story isn’t over. In recent years, conservation efforts in Kanchanaburi have gained momentum. Researchers and local organizations are working to restore the Thai Yisok population through breeding programs and reintroduction projects. These initiatives aim to bring back the ecological balance of the Kwai River and preserve a species that once defined the region’s natural wealth.
The Future of the Thai Yisok Fish– A Symbol of Kanchanaburi’s Natural Beauty
The Thai Yisok fish represents more than just a piece of local history—it embodies the deep connection between the people of Kanchanaburi and the Kwai River. Its story serves as a reminder of the importance of environmental conservation, urging us to protect and restore the natural beauty of Thailand’s rivers.
With continued efforts, we hope that one day, the Kwai River will once again be filled with the sight of Thai Yisok fish swimming freely, reclaiming their title as the King of the River. Until then, this legend continues to inspire both locals and visitors who come to explore Kanchanaburi’s rich history, culture, and natural wonders.
Source: TAT Kanchanaburi Office, Blogger.com, Thai PBS
Image: TAT Kanchanaburi Office
Story: Krongthong