[1][2] The source of the river is 5 km northeast of Satis, Pervomaysk, Nizhny Novgorod Oblast.

[1] The width of the river is about 2–3 meters near the village of Satis (Pervomaisky District), which is a few kilometres from the source.

The presence of underwater springs largely explains the river does not freeze during the winter period in some areas.

The following fish species inhabit the Satis, including its tributaries and other bodies of water in the river basin: Representatives of the ichthyofauna of Moksha are found in the lakes located on the territory of the Mordovia Reserve: Sheatfish, Pikeperch, etc.

The population of species that are sensitive to pollution, such as Gudgeon, Bleak, Chub, Ruff, and Dace has increased.