Harches were an imposing humanoid, spider-like sentient species. They had six arms and six red eyes, and a pair of chelicerae near their mouths. Harches had grey skin and were covered in brown hair. Harches also had a habit of making clicking noises sometimes when they talked. Admiral Trench of the Confederacy of Independent Systems was a male Harch from Secundus Ando. Trench was one of the largest members of his species as the exoskeletons of the harch could not bear the weight of their fur.