The Baikal seal, also known as the nerpa, is a freshwater seal species found exclusively in Lake Baikal, Siberia, Russia. It is the only freshwater seal in the world and is well-adapted to its cold environment. Baikal seals have a streamlined body, a thick layer of blubber for insulation, and a distinctive spotted coat that helps them blend into their surroundings. These seals primarily feed on fish and invertebrates found in the lake. They are known for their ability to dive deep and hold their breath for extended periods while hunting. The Baikal seal is an important part of the Lake Baikal ecosystem and is considered a vulnerable species due to habitat loss and climate change.