Mass Effect Wiki


2,976pages on
this wiki
Add New Page
Add New Page Talk0
Planet View
Type Post-Garden
Orbital Distance 2.0 AU
Orbital Period 2.8 Earth Years
Keplerian Ratio 1.02
Radius 6,501 km
Day Length 69.6 Earth Hours
Atm. Pressure 1.8 atm
Surface Temp 34 °C (temperate zone)
Surface Gravity 1.1 g
Mass 1.134 Earth Masses
Satellites N/A

Location: Milky WayNubian ExpanseKalabsha System First planet

Capital New Karnak
Colony Founded 2170
Population 488504
Prerequisite: Jack: Subject Zero (Mass Effect 2)
Prerequisite: Priority: Thessia (Mass Effect 3)


With over 90 percent of its surface covered in oceans, Yamm is a habitable nitrogen-oxygen world, but its extremes can be quite hostile to sapient life. The heat from its extremely long days reaches dangerous levels ranging from 24 Celsius at night to 53 in the afternoon in the temperate zones. Hurricanes run unchecked across the oceans, with winds reaching up to 250 kilometers per hour. While there are some arthropod-like animals, the predominant forms of life are various kinds of toxic algae blooms that stretch hundreds of kilometers across. However, other biohydrocarbon algae blooms are suitable for use as a biofuel, and farming the "green gold" forms the backbone of Yamm's economy.

Mineral DepositsEdit

Initial Scanner Result: Moderate

Mineral Amount Approximate Value
Palladium Medium 8,200
Platinum Medium 7,200
Iridium Medium 7,900
Element Zero Low 3,900

Search and Rescue Edit

Main article: Search and Rescue


  • It is possible that this planet is named after the Hebrew word "Yam" which means Sea or Ocean.
  • Yamm is the Canaanite chaos god of the oceans and is featured in the Ba'al Cycle of Ugarit myth.
  • The capital city New Karnak is probably named after the city Karnak, located in Egypt.

Also on Fandom

Random Wiki