User blog comment:Ironreaper/Retcons and Contradictions in the Reapers/@comment-1888392-20120415161313/@comment-3325589-20120415233105

Awesome as that would be, I think it's pretty widely agreed that the larval form of the human Reaper would eventually become the core of a Reaper capital ship, and the humanoid skeleton presumably wouldn't be visible from outside. Pretty much all Reapers seem to look identical or close to it (Harbinger is the only real exception I can think of), and the Reapers have assimilated countless other species, so it stands to reason any differences between species' Reaper incarnations are not reflected in their outward appearance.