One of the most intriguing seals on the planet — not only because of its round, plush appearance, but because it lives exclusively in Lake Baikal in Siberia, the world’s deepest and oldest freshwater lake. It’s the only purely freshwater seal species, a quirky evolutionary exception in a family mostly tied to icy oceans. Compact and thick-bodied with a silvery to dark gray coat, big dark eyes, and a whiskered face, it looks almost cartoonishly soft — yet it’s tough enough to thrive where winters are long and ice locks the lake for months.

Baikal seals spend much of their time diving in the lake’s crystal-clear, frigid waters, hunting small fish (especially the Baikal oilfish) and crustaceans. They’re excellent divers, easily reaching depths of 200 meters (650+ ft) and holding their breath for more than 20 minutes. Thanks to a thick layer of blubber and an efficient metabolism, they’re well-suited to life in extreme cold. When winter freezes the lake, they maintain breathing holes through the ice, using strong claws to scratch and widen the openings — a behavior that requires strength and persistence.

Despite living in a remote lake, Baikal seals face challenges. Climate change, shrinking ice cover, pollution, and fluctuations in their fish prey affect their population. Thankfully, they remain relatively abundant, with tens of thousands still living in the lake, and are currently considered Least Concern, though scientists closely monitor trends. Their survival depends on the continued health of Lake Baikal — a unique ecosystem home to many species found nowhere else on Earth.

Distribution

Country

Population est.

Status

Year

Comments

Russia

80,000-100,000

Official estimate

LC

2015