Stocking density effect of Heterobranchus bidorsalis (Š) and Clarias gariepinus (‰) hybrid juveniles stocked at densities of 7, 14 and 21 catfishes m-2 in three varied culture tanks (concrete, metal and plastic) were studied for 20 weeks. Total length and weight of catfish juveniles were recorded every fortnight. Plastic tanks with stocking density of 7catfishes m-2 had the best weight gain (4.89 } 6.81 g) while the least weight gain (1.39 } 2.16 g) was recorded in concrete tank with stocking density of 21 catfishes m-2. There was significant difference between stocking density of 7 catfishes m-2 (4.13 } 5.38 g) and 21 catfishes m-2 (1.82 } 2.26 g) (P < 0.05). There was no significant difference inspecific growth rate, feed efficiency and condition factor of catfishes in all culture tanks and stocking densities. The best total length of 12.23 } 5.22 cm was obtained in concrete tank with stocking density of 7 catfish m-2. The least mean total length (9.44 } 4.04 cm) was recorded in plastic tank with stocking density of 21 catfishes m-2. The effect of stocking density on total length was significant between stocking densities of 7 catfishes m-2 (11.85 } 5.52 cm) and 21 catfishes m-2 (9.54 } 4.01 cm) (P < 0.05)
