Phemiss was the capital city of New Plympto, homeworld to the Nosaurians. Phemiss was once a major center of rikknit egg exporting, but demand from the citizens of the Galactic Republic dried up, leaving Phemiss a shadow of its former self. It was located between the Tsilor Sea and Pharine River, and contained Phemiss Low Port and Phemiss Bridge.

Phemiss was likely damaged during the Clone Wars when New Plympto was allied with the Confederacy of Independent Systems. Like the rest of New Plympto, Phemiss was rendered completely uninhabitable following the Yuuzhan Vong's use of a biological weapon that destroyed all life on the planet.