You say LEGO mecha animals, all I hear is Mitsuru Nikaido. Few builders have such a remarkably consistent style across so many builds. Some of my favourites in this series are deep-sea creatures; something about the exoskeletal style just really works for marine life. The venerable sea turtle is latest to be added to the menagerie. The white shell really pops against the dark grey of the turtle’s mechanical innards. Some of Nikaido-san’s creatures feature white heads to draw the attention that way, but in this instance I think the grey is a better choice. It emphasises the difference between the hard shell and the soft tissue underneath. Well, as soft as a mechanical turtle can be, anyway.