Wildest Islands - Zanzibar - Land of Giants

On the Zanzibar islands, off the Indian Ocean coast of Tanganyka, mild predation and relatively easy feeding contributed to the development of giant species, as of crabs and bats. Only Pemba, the second largest island, is a regular la,d mass, the others were coral reefs until the sea-level fell. Its coastal waters harbor aquatic giants too, like whale sharks and mantra rays.