sentences:  In 1778, Cook discovered and named Bristol Bay and then sailed northward around Cape Newenham into Kuskokwim Bay.During the second phase of the Russian period (1785 to 1825), the Shelikhov-Golikov Company and later the Russian-American Company was organized and continued in the exploration of the lucrative north Pacific Ocean sea otter trade.During this time, they improved their treatment of the native people, skipping massacres for virtual enslavement and exploitation.