Check out Low Poly Polystyle Ocean Underwater Environment Low-poly 3D model on CGTrader for $29.99. High-quality mesh by EtherionDesigns: 5000 polys, 3000 vertices. Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 110 MB), FBX (Autodesk FBX, filesize: 31.9 MB), MAX (Autodesk 3ds Max, filesize: 110 MB), TEXTURES (Textures, filesize: 31.4 MB), UASSET (UnrealEngine, filesize: 53.6 MB), UNITYPACKAGE (Unity 3D, filesize: 24.3 MB)