This article focuses on the mitigation of cavitation in fluid flow under specified velocity conditions. A Clark-Y hydrofoil with a 70 mm chord length is designed to emulate a fish-gill-inspired configuration aimed at suppressing unsteady cavitation phenomena. Jet injection with a velocity of 0.5 𝑈∞ is implemented at 15% and 60% of the chord length on the hydrofoil surface under an 8-degree angle of attack. The jet is aligned parallel to the mainstream flow. The flow is modeled using the multiphase implicit Volume of Fluid (VOF) method coupled with the Large Eddy Simulation (LES) turbulence model to accurately capture the transient behavior of cavitating flow. Simulations are performed at a cavitation number of σ = 0.8 and a Reynolds number of 7 × 10⁵. The numerical findings demonstrate that jet injection effectively stabilizes the cavity shedding process and reduces the amplitude of pressure fluctuations on the hydrofoil surface. The injection at 15% chord length not only decreases cavity length but also delays the onset of cloud cavitation, resulting in a smoother pressure recovery and enhanced hydrodynamic performance. In contrast, injection at 60% chord length provides localized suppression of trailing-edge cavitation without significantly affecting leading-edge dynamics. Overall, the study highlights the capability of controlled jet injection as an efficient passive method for mitigating unsteady cavitation and improving flow stability around hydrofoils.