Pattaya, Thailand– Early on May 14th, 2026, a large school of blackchin tilapia (Oreochromis mossambicus), a species typically associated with freshwater environments, invaded the shoreline of Pattaya Beach, startling local anglers, squid fishermen, and tourists.
At approximately 3:00 AM, Facebook user “Tart Channel,” which boasts more than 20,000 followers, posted a video clip showing the dramatic scene. The footage quickly drew widespread attention as crowds gathered to watch the unusual event unfold along the popular beach.
Mr. Tart Unkaen, 40, the content creator behind the channel and owner of the video, told reporters that he regularly fishes for squid along Pattaya Beach and produces fishing-related content from various locations. He was alerted by fellow anglers to the sudden appearance of the large school of blackchin tilapia and decided to test a casting net in an attempt to help control the situation.
The net cast proved highly effective, catching a substantial number of the fish. However, the sheer volume of the catch left Mr. Tart deeply concerned about the marine ecosystem of Pattaya Beach. He questioned how a freshwater species like the blackchin tilapia could thrive in saltwater conditions and establish such a significant presence.“I’m worried about the impact on our local marine life,” Mr. Start said. “These fish could threaten baby fish, squid hatchlings, and other native species. If they are allowed to breed unchecked, they may severely disrupt the coastal ecosystem and affect the livelihoods of nearshore fishermen in the future.”He has called on relevant authorities to urgently investigate the incident on-site, determine the cause of the invasion, and implement effective prevention measures.
Blackchin tilapia are known as an invasive species in many regions due to their hardy nature and rapid reproduction. Their unexpected appearance in Pattaya’s seawater has raised questions about possible environmental changes, water quality issues, or accidental releases that may have enabled them to adapt to the marine environment. Local officials have not yet issued an official statement on the matter.
