Diagnostic techniques in aquaculture are crucial for identifying and managing diseases in farmed aquatic animals. Common methods include PCR (Polymerase Chain Reaction), histopathology, and microbial culture, which allow precise detection of pathogens. Accurate diagnostics enable timely interventions, reducing losses and improving animal welfare. Molecular techniques, due to their specificity and speed, are widely adopted in disease monitoring and management. As technology advances, diagnostic methods continue to improve, supporting more resilient aquaculture systems. Reliable diagnostics are foundational for health management, helping farmers maintain productivity while adhering to sustainable practices in aquaculture.