Invasive blackchin tilapia caught in large numbers off Chonburi coast

Chonburi — A local fisherman in Chonburi was astonished to discover approximately 200 kilogrammes of blackchin tilapia (Sarotherodon melanotheron) in his net off the coast of Rong Po, located in Bang Lamung district. This significant catch has raised concerns among the local fishing community regarding potential impacts on marine ecosystems and mussel farms.

The incident occurred on August 12, 2026, when Natthakorn Suea-iam, also known as "Tai Nut," went out to catch fish for his family dinner. Instead of the typical grey mullet, his net was filled almost entirely with blackchin tilapia. He estimated the total catch to be around 200kg and shared a video of the haul on Facebook, which garnered attention from local residents.

Upon examining the catch, Natthakorn expressed shock at the abundance of blackchin tilapia he had never encountered in the area before. He had heard about the issues involving this invasive species in other parts of Thailand but had never witnessed such a large number in his locality. After sharing the fish with those in need, he kept some for culinary experimentation, noting that the fish tasted similar to Nile tilapia but with a fattier meat content.

Natthakorn is now concerned about the potential ecological impacts of the invasive blackchin tilapia, particularly its possible migration from Bang Lamung Canal into the sea following heavy rainfall. He emphasized that this is merely an assumption based on his observations, and local authorities must investigate the source and establish the facts.

Local fishermen from Rong Po, who also run mussel farms, have expressed worry about the potential effects on local aquatic resources and coastal ecosystems, including mussel-farming areas. They urge fisheries officials and relevant agencies to conduct urgent surveys to assess the fish population and distribution and investigate any possible environmental impacts.