Colartas are tall, bipedal, lizard-like creatures with an acute sense of smell and sense of heat signatures which make them excellent hunters. They have more than one heart, and are able to shape-shift. Some are "indentured servants" to the Peacekeepers: they must successfully complete nine search-and-recovery or search-and-destroy missions in order to gain their freedom. They seem to be more susceptible to heavy gravity than Sebaceans or Humans, possibly due to the height and build of the species.
John Crichton refers to the species as "piña coladas".