Ungava Bay is a bay in Nunavut, Canada separating Nunavik from Baffin Island. Although not geographically apparent, it is considered to be a marginal sea of the Arctic Ocean for climatic reasons. The bay is roughly oval-shaped, about 260 km (160 mi) at its widest point and about 320 km (200 mi) in length; it has an area of approximately 50,000 km2 (19,000 sq mi). It is generally fairly shallow, under 150 m (490 ft), though at its border with the Atlantic Ocean depths of almost 300 m (980 ft) are reached.