Lake Malawi is known on its Mozambiquan side as Lago Niassa and is also commonly called The Calendar Lake, being 365 miles long and 52 miles wide. It is the southernmost of the lakes in the Rift Valley system and the second-deepest after Lake Tanganyika. The lake also reputedly contains the highest number of different fish species of any body of water in the world including several hundred endemic species of cichlid, a brightly-coloured fish popular with collectors around the world. Indeed it has become a popular hobby amongst fish-fanciers to recreate a Lake Malawi biotope in an aquarium. Bad luck cichlids – I am sure they’d rather live in a lake 365 miles long!