11. The surrounding sea is obstructed by pack ice even in the summer months. 12. The expedition's ship " Admiral Tegetthoff " was abandoned in the pack ice . 13. In winter, it feeds on benthic prey, mostly flatfish, under dense pack ice . 14. The extreme cold has resulted in 80 centimeter-thick ( 32-inch ) pack ice . 15. Presumably, the pack ice eventually crushed and sank the abandoned " Advance ". 16. They are native to coastal regions and pack ice around the Arctic Sea. 17. The view reminded scientists of pack ice on a polar sea. 18. The pack ice was heavier that summer than any experienced polar hands could remember. 19. Unfortunately, the lives of large animals in the winter pack ice remain a mystery. 20. We've even broken through 18-meter-thick ( 60-feet-thick ) pack ice ,"
