Tenis (Russian: Тенис), is a lake in the southern part of the West Siberian Plain, Omsk Oblast, south-central Russia.

Both parts are connected by an over 2 kilometers (1.2 mi) wide sound.

[5] The Ust-Logatka and Ust-Kiterna settlements of Krutinsky District are located by the lake.

Very close to the north lies a cluster of smaller lakes, including Synkul, Kalykul, Sazykul, Gorkoye and Achikul.

[6][7][3] Among the fish species found in the waters of the Tenis/Saltaim, crucian carp, pike, zander, perch, bream and carp are worth mentioning.