Good and bad classification of stinging catfish ( Heteropneustes fossilis).

Good quality stinging catfish Eyes clear and bulging Skin shiny with natural slime Flesh firm and elastic Gills bright red or pink Fresh, mild fishy smell No discoloration or spots Active movement if live Bad quality stinging catfish Eyes sunken and cloudy Skin dull, sticky, excess slime Flesh soft, leaves finger mark Gills brown, grey, or black Strong foul or ammonia smell Presence of spots, wounds, or parasites Lethargic or dead for long time Conclusion Good fish is fresh, firm, and odorless. Bad fish shows spoilage signs and is unsafe for consumption.