Assessing the risk of climate change to aquaculture: a national-scale case study for the Sultanate of Oman

•Aquaculture is crucial for world food security yet climate change causes many risks.•We provide a framework for assessing risks from climate change to aquaculture.•Oman aims to expand aquaculture but is also in one of the hottest regions on earth.•We identify key risks to aquaculture in Oman along with adaptation options.•This aquaculture climate risk assessment is readily applicable to any other country.