Swim or fly okay, reasonably likely locomotion methods. Wheels, OTOH, look unlikely, and massless particles is too exotic to contemplate, or at least contemplate beyond wild guessesChuma wrote:Just to be annoying, let me also point out that there is no particular reason why animals should evolve to have legs. The could just as well have, say, wheels, or they could be stationary, or they could all swim or fly, or they could be composed of massless particles...
Also, for higher gravities, I imagine being snakey would work great