Crab farmers in Ranot District, Songkhla are receiving support from the provincial fisheries and a local company to control the population of 'black-chinned tilapia' in aquatic farms. The initiative involves using 'tea waste' to create an environment unfavorable for the tilapia, thereby reducing risks for crab farmers and controlling the spread of the fish. The district is also implementing other measures such as releasing predatory fish, using tilapia for bio-fermented water, and regularly surveying water sources. The article emphasizes the need for cooperation from all sectors to effectively control the population of the tilapia and reduce its impact on natural water sources.