Frobisher Bay, arm of the Atlantic Ocean, 150 mi/240 km long and from 20 mi/32 km–40 mi/64 km wide, Baffin Region, N.W.T., Canada. Cutting deeply into SE Baffin Isl., it has steep, deeply indented shores and numerous islets. On its SW side the Grinnell and Southeast icecaps rise to c.3,000 ft/910 m, extending tongues into the bay. At its head are Frobisher Bay trading post (est. 1914) and an air base. The bay was explored (1576) by Sir Martin Frobisher; until 1860 it was believed to be a strait separating Baffin Isl. from another isl.
