Hudlarian

The Hudlarians were a sentient species from the heavy-gravity planet of Hudlar, with the physiological classification FROB.

Adult Hudlarians weighed about two Earth tons, and possessed an incredibly hard, but still flexible tegument which allowed them to live and work comfortably in any atmosphere of lesser pressure down to and including the vacuum of space. Combined with the highest-known level of radiation tolerance in any species, they were invaluable as space assembly workers. ("Medic")