The Great Slave Lake, in Canada's Northwest Territories, is named after a group of Athabascan-speaking Indians called the Slave or Slavey. For nearly half the year, the ice on Lake Ysyk is thick enough to hold trucks and cars; every day in the winter, several hundred vehicles take a shortcut from Yellowknife to Dettah. O'Higgins/San Martín Lake is 836 meters deep in the Patagonian Andes. The Caspian Sea is 1,025 meters deep and has up to 1,000 fish species. Lake Nyasa has 15% of all freshwater fish species on the planet.<br /><br />The Baikal seal is the world's only freshwater seal species. It is unknown how the seals got to Lake Baikal, which is hundreds of kilometers inland, from the seafloor.
