Lives in a total symbiosis with the Memer. Saret are small grey sentient lumps that hang from the belly of a Memer.
Memer breathe carbon dioxide and exhale oxygen and the Saret breathe oxygen and exhale carbon dioxide. Which mean that the Memer and Saret do not need any source of breathing in space. This gives them an advantage and they are the traders of the galaxy. Seen everywhere and in every spaceport with their trading ships.
Saret have no society other than the Memer society.
Sources: GURPS Aliens,