On site: https://lb3d.co/product/remastered-crab-monster-unity-3d-asset/

The crab monster – remastered! This was one of my older creatures — and my first major creature project. It has a few quirks, but its pretty good. As a free asset, it has been very popular. I’ve recently remastered it using Substance Painter, bringing out the details, and adding a few more textural features.