Low poly (6000 face) un-rigged hydra. Symmetric, unrigged. Non, quad based, came from sculptris. Painting the model will result with symmetric changes unless you re-UV-unwrap.
The texture seen in this image imitating the scales is just voronoi. There's another texture included, but it's not for render, but a guide for texture painting in the symmetric UV map.
As there's no tag feature I put some keywords here: monster, sci-fi, snake, mutant, alien