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The freshwater mussel ( Lamellidens marginalis ) was employed with a 28-day aquarium rearing of stinging catfish ( Heteropneustes fossilis ) exposed to a sublethal concentration (0.75 mg/l) of Pb(NO 3 ) 2  to evaluate the growth, Pb bioaccumulation, and associated liver histopathology in fish. Three treatments (T 2 , T 3 , and T 4 ) and a control (T 1 ) were assigned with 20 fish and 5, 20, 40, and 0 numbers of mussel each. The specific growth rate, percentage of weight, and length gain showed a larger increase of Pb in T 3  and T 4  than in the control and T 2 . After 28 days, the highest amount of muscular and hepatic Pb was recorded as 2.43 ± 0.01 mg/L and 7.79 ± 0.8 mg/L respectively in the control group (T 1 ); the lowest amount was recorded in T 4  as 0.46 ± 0.07 mg/L and 4.41 ± 0.58 mg/L respectively. Liver histopathology exhibited vacuolization, raptured hepatocytes, blood congestion, necrosis, and fat droplets accumulation in different intensities. The control group manifested severe pathology; the T 4  treatment exhibited comparatively low signs.

Freshwater mussel ( Lamelliedens marginalis ) to reduce the lead (Pb) bioaccumulation in aquaculture of stinging catfish, Heteropneustes fossilis