Waves surge, currents flow, and particles sink in a dynamic seascape that marine organisms perceive in unique ways. Much of the uniqueness of marine organisms can be attributed to physiological adaptation to the environment. Climate change is altering the ocean environment by increasing temperatures, reshaping oxygen minimum zones, and decreasing pH changing the layout of habitats and pushing marine organisms closer to their physiological limits. As species with varying physiological adaptations respond differently to climate change, ecosystems will be restructured. Understanding the underlying mechanisms that shape the biogeographic ranges of species and predicting future changes to those ranges from regional to global scales are the central themes of my research as a marine ecologist.