Franz Josef Land and snow bunting. Some ivory gulls, little auks and Brünnich's guillemots opt to spend the winter on the islands. The polar bear population of Franz Josef Land lies within the Barents Sea subpopulation, which also includes polar bears inhabiting Svalbard and the western coast of Novaya Zemlya. In 2004, the Barents Sea subpopulation was estimated at 2,650. There is also a population of Arctic fox, which typically have their territories near seabird habitats. Being declared as a marine mammal sanctuary, the island has rich biodiversity of rare marine mammals. Three species of seals habit the archipelago. Harp seal is the
German submarine U-355 hit by three torpedoes, sank within 10 minutes around 17 miles west of Novaya Zemlya. Of the crew, 29 men, seven gunners, and two naval signalmen were killed. The master and 12 men landed at Pomorski Bay, Novaya Zemlya. Another seven survivors took shelter on the American merchant ship , (also of PQ 17), which had run aground and been abandoned on North Gusini Shoal, Novaya Zemlya, and were later rescued by a Soviet survey ship. The U-boat returned to Narvik on 12 July after 27 days at sea. This was "U-355"s only success despite sailing on another eight patrols