Baffin Bay, a large, deep body of water between Greenland and Canada's Ellesmere, Devon, Bylot, and Baffin islands. The bay is linked with the Arctic Ocean by several narrow channels and with the Atlantic Ocean by Davis Strait. Maximum depth is about 7,860 feet (2,400 m). Although ice-covered most of the year, Baffin Bay is open to ships in summer. Icebergs make navigation hazardous. William Baffin discovered the bay in 1616.