Check out Sci-fi horseshoe crab model 3D model on CGTrader for $2. High-quality mesh by JindaArch.
STL (Stereolithography, filesize: 35.2 MB), OBJ (OBJ, filesize: 45.6 MB), BLEND (Blender, filesize: 691 KB), DXF (DXF, filesize: 87.5 MB), DAE (Collada, filesize: 2.47 MB), GLTF (glTF, filesize: 882 KB), FBX (Autodesk FBX, filesize: 15.3 MB)