Check out Leaf Betta Fish Sculpture Organic Animal Form Flowing Fins 3D Low-poly 3D model on CGTrader for $25. High-quality mesh by narakiss: 449000 polys, 290000 vertices. Rigged, Animated, PBR.
STL (Stereolithography, filesize: 23.8 MB), OTHER (Other, filesize: 39.6 MB), FBX (Autodesk FBX, filesize: 83.1 MB), GLTF (glTF, filesize: 50.5 MB), TEXTURES (Textures, filesize: 34.2 MB), PNG (PNG, filesize: 34.2 MB)