Blue whales (Balaenoptera musculus)  are the largest animals that have ever existed on Earth. Despite this, they feed exclusively on krill (Nyctiphanes australis) which are typically no larger than 2 cm. Thus, they must consume massive amounts of these tiny organisms to support the large energy requirements of their life history processes. Researchers are interested in understanding how predator-prey dynamics between blue whales and krill may shift with changing ocean conditions. Nicole Principe is a 2nd year PhD student in the Geospatial Ecology of Marine Megafauna (GEMM) Lab at the Oregon State University Marine Mammal Institute, led by Dr. Leigh Torres. Her PhD work is part of the SAPPHIRE (Synthesis of Acoustics, Physiology, Prey, and Habitat in A Rapidly Changing Environment) Project and will focus on blue whales in the South Taranaki Bight in Aotearoa (New Zealand). This interdisciplinary work involves using oceanographic data, active acoustics for prey, drone imagery (i.e., photogrammetry), and hormone analysis to investigate the availability of krill and blue whale health and population resilience to climate change.