This is the Introductory episode of the HotFish series of podcasts from the Institute of Aquaculture, University of Stirling. These are a series of conversations around the implications of climate change in different aquaculture and aquatic food contexts. They especially feature early-career researchers tackling a range of challenges in different countries. We hope they will be a useful contribution to the upcoming COP26. The podcasts have been produced with financial support from Belmont NERC.