The Zanzibar Channel is a strait in south-eastern Africa, separating the island of Unguja (also known as Zanzibar) from mainland Tanzania. The channel is 120 km long and 29-37 km wide, with depth varying from a few dozen metres (in the centre) to a few hundred metres to the north and to the south. In ancient times the overall depth of the channel has been considerably smaller (about 120 m less during the last ice age).
The Zanzibar Channel in an 1872 map
|Ocean/sea sources||Indian Ocean|
|Max. length||110 km (68 mi)|
|Max. width||37 km (23 mi)|
In 2015, the 29km solo swim across the Zanzibar Channel starting at the Pungume Sandbank was completed in 9 hrs 1 minute by Jean Craven (SA) , Robert Dunford (Kenya), Megan Harrington Johnson (SA), Samantha Whelpton (SA) and Emil Berning (SA)