The article aims to highlight body development through weight monitoring and other morphometric parameters of Clarias gariepinus reared in concrete tanks and floating cages for 150 days. Then, 6400 individuals with average body weight (103.91 ± 32.74 g) and initial total length (24.08 ± 2.31 cm) were distributed in two floating cages (5 x 5 x 2.5 m3) on Lake Toho in Benin and two concrete tanks (3.8 x 3.8 x 1.5 m3) at densities of 2000 individuals / cage and 1200 individuals / tank respectively. The fish were hand-fed three times a day until apparent satiety with a pelleted commercial feed containing 45% crude protein. The results obtained showed better performance in floating cages than in tanks and were respectively as follows: total length (53.37 ± 6.31 vs 43.47 ± 4.56 cm), standard length (48.10 ± 5.58 vs 38.86 ± 4.32 cm), pre-dorsal length (15.20 ± 2.16 vs 12.46 ± 1.62 cm), length of the head (9.74 ± 1.92 vs 7.48 ± 1.13 cm), dorsal fin base length (30.19 ± 4.46 vs 24.46 ± 2.97 cm), interorbital width (5.78 ± 1.89 vs 4.50 ± 0.61 cm), body height (6.45 ± 1.14 vs 5.20 ± 0.80 cm), height of the caudal peduncle (4.12 ± 0.66 vs 3.32 ± 0, 49 cm), body weight (1245.43 ± 479.33 vs 661.91 ± 230.51 g). This confirms that when conditions permit, the use of floating cages is to be promoted.