What is the Pusa sibirica, found exclusively in Lake Baikal?

Question

Titicaca, which contains one of the highest freshwater lakes in the world, is populated by people who live exclusively on the Uros. What is that?

Answer 1

A seal
The Baikal seal is one of the smallest true seals, and one of the few seals whose habitat is exclusively freshwater, the only freshwater species which does not also have a marine sub-population. Lake Baikal is a rift lake in southern Siberia in Russia.