Non-humanoid mecha

I’m not that well-versed in animé, or mecha in general, but what kind of non-humanoid mecha designs have you seen out there? Of the mecha shows I’ve watched, all of them have the humanoid design-i.e. legs with arms and humanoid head-shape. (I know this is starting to sound…oxymoronic)…

The only one distinctively non-human mecha design (and indeed, non-human pilotable) mecha design I know if is the Rahkshi . What is pretty cool is that they are piloted by ‘dark slugs’ (essentially), and are in fact just non-sentient shells of metal.

The most non-human design I can think of is Jeremiah’s Sutherland Sieg in Code Geass R2, which is probably not even classifiable as a mecha.