Every year on 11 August, World Krill Day draws global attention to the small but mighty Antarctic krill (Euphausia superba)—a cornerstone of the Southern Ocean ecosystem. For decades, the South African National Antarctic Programme (SANAP) has played a role in advancing krill research, from early expeditions that mapped their distribution and seasonal abundance, to long-term monitoring of how environmental change impacts their population dynamics. Historical studies conducted on board research vessels such as the SA Agulhas have built a foundation of knowledge on krill biology, diet, and role in supporting predators like penguins, seals, and whales. These efforts have helped inform sustainable fishing guidelines and contributed to international collaborations through the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR).

Today, SANAP’s scientists continue to track krill populations using modern acoustic survey techniques, satellite-linked oceanographic data, and advanced modelling to understand how sea ice shifts and warming waters may affect their future. Current projects explore krill’s role in the carbon cycle and their resilience to environmental stress, while future research aims to integrate genetic studies to assess population connectivity across the Southern Ocean. By combining historical data with cutting-edge science, SANAP is helping to safeguard this keystone species—and, in turn, the health of the entire Antarctic ecosystem.

On this World Krill Day, we celebrate not just the species itself, but the decades of South African research dedicated to understanding and protecting it.

Documents and references available on ALSA Repository