[1] According to legend, Kuchum, the last Khan of Sibir, sank his treasure in the lake while fleeing from the Russians.

The lake bottom consists of clayey sand covered by a thick layer of gray fine-grained silt.

In the mid-20th century Lake Ubinskoye was well known for its abundance of fish: bream (introduced in 1929[2]), roach, pike, ide, carp, and peled were exploited commercially.

Fish stocks crashed in the 1990s, likely due to the lowering of the water level; currently only small crucian carp remain.

Attempts to restock the lake have failed, but a recent increase in water levels gives hope for future efforts.