Narriman Saleh Jiddawi is a senior lecturer at the Institute of Marine Sciences, University of Dar es Salaam. Marine ecosystems are deteriorating worldwide, and with them the capacity to support human well-being. Unless the value of all goods and services provided by marine ecosystems is recognized in the national income accounts, there will be a continuing tendency to undervalue their contribution to sustainable economic welfare, and consequently to under-invest in marine conservation. Jiddawi’s Pew fellowship focused on promoting marine conservation by developing accounts for marine ecosystems based on a case study of Zanzibar. As a result of her fellowship, she was able to provide policymakers with the economic indicators and analyses from the accounts to support policy critical to marine conservation.