The hydrodynamic design of autonomous underwater vehicles (AUVs) is based on accurately estimating the lift and drag forces. This investigation employs Computational Fluid Dynamics (CFD) to estimate these forces for a newly designed fish-shaped AUV. The AUV features a closed structure with a static ballast system. Unlike dynamic systems, a static ballast does not require continuous power to remain submerged or afloat, making it energy efficient for maintaining a specific depth or floating at the surface. The design model was created using SolidWorks 2023 and refined in ANSYS Workbench 2024. CFD techniques are applied to analyze the lift and drag forces under varying angles of attack and speed conditions to evaluate their hydrodynamic performance. The objective is to build and assemble the components of the AUV and then simulate them on a GAZEBO-like platform to assess their stability. The model can also be exported as an STL file for 3D printing. The AUV is equipped with three bi-directional thrusters for propulsion, providing three degrees of freedom and classifying it as underactuated. The CFD-based analysis of the new fish-shaped AUV focuses on improving its design for enhanced performance and examining how different angles and speeds affect its lift and drag forces. The velocity contours, vectors, and streamlines are computed at various speeds to evaluate the overall performance of the vehicle.