In Brazil, excessive rain is threatening the sustainability of fish farming, particularly in regions like Regente Feijó, São Paulo. Fish farmer Rafael Mazzucchelli, who cultivates over one million tilapias, emphasizes the importance of monitoring their health and behavior, especially when feeding. His operation involves two different systems - a covered tank using the RAS method and an open earth tank, both of which are sensitive to environmental changes.

The viability of fish farming largely depends on maintaining proper oxygen levels in the water, a critical factor for tilapia growth. Each tank holds about 30,000 liters and can support up to 700 kilograms of fish at optimal conditions. However, excessive rainfall can disrupt this balance, leading to oxygen deficiency and negatively impacting fish health and growth. Farmers must adapt to these challenges to sustain their livestock.

According to Embrapa, the Brazilian Agricultural Research Corporation, the impact of heavy rainfall extends beyond individual farms. It poses a broader challenge to the fish farming industry in Brazil, affecting production costs and management practices. As farmers like Mazzucchelli confront these obstacles, the need for effective strategies and resilience in agricultural practices becomes increasingly important to safeguard their livelihoods and ensure food security in the region.