This paper reviews the application of Computational Fluid Dynamics (CFD) in biomimetic designs for underwater vehicles, focusing on biomimetic propulsion, drag reduction, and noise reduction. Biomimetics, inspired by nature, aims to create efficient and unique designs for underwater vehicles, enhancing speed, reliability, and maneuverability while reducing drag and noise. CFD technology, capable of precise fluid flow predictions, plays a crucial role in optimizing vehicle designs, improving hydrodynamic and kinematic performances. The paper highlights the integration of CFD with biomimetics, emphasizing the importance of understanding and simulating fluid dynamics in complex marine environments. Key methods in CFD, such as Reynolds-Averaged Navier-Stokes (RANS), Unsteady RANS (URANS), Large Eddy Simulation (LES), Detached Eddy Simulation (DES), and Direct Numerical Simulation (DNS), are discussed, along with their applications in various biomimetic designs. The review covers specific biomimetic propulsion mechanisms, including hydrofoil-like tail fin flapping, robotic fish, batoid-style, dolphin-style, and squid-style propulsion. Each section details the design principles, numerical simulations, and experimental validation, highlighting the advancements in understanding and optimizing these propulsion systems. For drag reduction, the paper explores biomimetic textured surfaces inspired by shark skin, pufferfish spines, and dolphin ridge skin, among others. These designs have shown significant reductions in resistance, enhancing operational efficiency and energy savings. Finally, the paper discusses noise reduction techniques inspired by biological mechanisms, such as the use of sound-absorbing materials and vibration frequencies, which can significantly reduce underwater vehicle noise. Overall, the paper provides a comprehensive overview of the current state of CFD in biomimetic applications for underwater vehicles, highlighting the potential for future advancements and interdisciplinary collaboration.This paper reviews the application of Computational Fluid Dynamics (CFD) in biomimetic designs for underwater vehicles, focusing on biomimetic propulsion, drag reduction, and noise reduction. Biomimetics, inspired by nature, aims to create efficient and unique designs for underwater vehicles, enhancing speed, reliability, and maneuverability while reducing drag and noise. CFD technology, capable of precise fluid flow predictions, plays a crucial role in optimizing vehicle designs, improving hydrodynamic and kinematic performances. The paper highlights the integration of CFD with biomimetics, emphasizing the importance of understanding and simulating fluid dynamics in complex marine environments. Key methods in CFD, such as Reynolds-Averaged Navier-Stokes (RANS), Unsteady RANS (URANS), Large Eddy Simulation (LES), Detached Eddy Simulation (DES), and Direct Numerical Simulation (DNS), are discussed, along with their applications in various biomimetic designs. The review covers specific biomimetic propulsion mechanisms, including hydrofoil-like tail fin flapping, robotic fish, batoid-style, dolphin-style, and squid-style propulsion. Each section details the design principles, numerical simulations, and experimental validation, highlighting the advancements in understanding and optimizing these propulsion systems. For drag reduction, the paper explores biomimetic textured surfaces inspired by shark skin, pufferfish spines, and dolphin ridge skin, among others. These designs have shown significant reductions in resistance, enhancing operational efficiency and energy savings. Finally, the paper discusses noise reduction techniques inspired by biological mechanisms, such as the use of sound-absorbing materials and vibration frequencies, which can significantly reduce underwater vehicle noise. Overall, the paper provides a comprehensive overview of the current state of CFD in biomimetic applications for underwater vehicles, highlighting the potential for future advancements and interdisciplinary collaboration.