It is not based on any particular species of fiddler crab but rather an amalgam of all the ones I could find reference images for.
Includes a color map, specular map, and a normal map in the sourceimages folder. The obj is all one piece, but you can break it apart into the body, each of the legs, and both parts of the claws and is included in the data folder. The scene file is rigged with the weights painted and controls set up.
The project folder, with the scene folder, data folder, and sourceimages folder, is compressed into a .rar format.