by government promotion that caused an increase from 19,000 tourists in 1985 to 376,000 in 2016 and 917,000 in 2025. The islands are accessible via five ports and the Abeid Amani Karume International Airport, which can serve up to 1.5 million passengers per year.

Zanzibar's marine ecosystem plays a vital role in its fishing and algacultural industries; these ecosystems