Trope-a-Day: Shapeshifting

Shapeshifting: Not really practical for most natural biology (although there are the myneni, who can shape their crystalplasm fairly effectively), but a property that more than a few specially designed bodies can have; from relatively-close-to-baseline changeling-shells that can vary their appearance within their species quite well, to advanced nanoswarm bodies that can become pretty much anything, at least in shape and physical functionality, even if they stay composed of the same kind of matter – although some can disperse into nanoclouds without much more density than smoke.