The Quarians are a fictional alien species from the video game series Mass Effect. They are known for their nomadic lifestyle, having left their home planet, Rannoch, due to a conflict with the synthetic race known as the Geth. Quarians wear environmental suits to protect themselves from diseases, as their immune systems are weak from living in sterile environments. Quarians are skilled engineers and technologists, often creating advanced technology and artificial intelligence. Their culture emphasizes community and cooperation, as they live aboard a fleet of starships called the Migrant Fleet. This unique way of life shapes their identity and influences their interactions with other species in the Mass Effect universe.