The method used was experimental method in the laboratory. The fish samples used amounted to 50 fish with a size of 5-7 cm (average size 6.00 cm). with a standard deviation value of ± 0.7642 cm. The results showed that the normal swimming speed of Pantau fish. The sustained swimming speed of pantau fish is less than 2.70 BL/second. While the maximum sustained speed produced by monitor fish is …