This case study details the work of Maersk Oil Qatar to monitor and protect marine ecology at the Al Shaheen oil field, which with a daily production of around 300,000 barrels per day is the largest offshore oil field in Qatar. Maersk Oil has signed a Memorandum of Understanding with the Ministry of Environment in Qatar that will act as an umbrella agreement for conducting biodiversity studies in Qatari waters and promote conservation of marine ecology.