In this chapter, the authors assess the vulnerability of aquaculture in the tropical Pacific to climate change. It begins by summarising recent and potential aquaculture production to set the scene for the sector, and then use the framework outlined in Chapter 1, based on exposure, sensitivity, potential impact and adaptive capacity, to evaluate the vulnerability of the main commodities for food security and livelihoods. It also looks at the risks posed by climate change to increased incidence of diseases.The authors then integrate all projected effects of climate change to assess the vulnerability of the sector as a whole. The chapter is concluded by examining the remaining uncertainty and the research needed to fill the gaps, and by identifying the management measures required to capitalise on the opportunities, and to minimise the adverse effects, expected to result from climate change.