Board Thread:General Discussion/@comment-1409696-20140330030844/@comment-7763430-20140407165514

Okay, so with that aside... an explanation could be bones made of a dense, metallic material. They could have evolved to where they generate electricity like eels, and then those that had longer protrusions outlived those that didn't (survival of the fittest, yada yada...) and the stitched patchwork look could just be an evolved defense mechanism that made them look more intimidating/threatening to their predators.