Abstarct: Increasing the efficiency of marine and watery equipment has been the subject of much industrial and engineering research in recent years. Making surface changes is one of the simple, inexpensive, long-lasting and non-polluting methods to change the hydrodynamic behavior of objects in fluids. In the present study, the effect of surface dimples on the hydrodynamic behavior of mextal spheres with a diameter of 20 mm has been investigated. This study was performed experimentally with seven different spheres, including one spheres without dimples and six spheres with surface dimples. The hydrodynamic behavior of mextal spheres in water was investigated by imaging using a high-speed camera at a rate of 1000 frxames per second and image analysis was performed with software for image processing. spheres at seven different release heights, in the range of dimensionless numbers, Froude number (1 to 200), Reynolds number (7019 to 99118), Weber number (13.58 to 2716.6), Band number (13.58) And capillary number (0.00383 to 0.05469) have been studied in three cavity type of quasi-static,shallow seal and deep seal. sphere without surface dimples forms cavity more than 200 in Froude numbers only, and in Froude numbers it does not form less than that cavity and deviates in the path of motion in water. All spheres with surface dimples in the impacte regimes with Froude numbers form more than 40 cavities and have a higher velocity in the path of movement in water and do not deviate from the path of movement and have good stability. Two spheres with surface dimples with five rows of dimples also form significant and large cavities in impact with Froude numbers greater than 10. Spheres with three and five rows of surface dimples from two spheres with one row of surface dimples in all impact regimes form more significant and larger cavities.