Every summer thousands of Southern Rockhopper penguins return to Marion Island after six months at sea. They mate, lay eggs and raise chicks, and during this time head out to sea every day to forage for krill (and sometimes squid and fish). Prior to 2011, nobody knew anything about where these penguins were going, but thanks to recent technological advances and the miniaturisation of GPS devices, I could track penguins from a small colony at Kildalkey during the summer period. I will be analysing this data, as well as diving data, as part of my MSc. Unfortunately, the population of Southern Rockhopper penguins at Marion Island has decreased dramatically over the last few decades which is why it is vital that we start understanding more about their foraging ecology in these waters.