Oceanic ecologies inherit sites and cycles for sensing practices in the making. These fluid bodies are teeming with microscopic organisms that collectively provide crucial ecosystem services, while humans develop techno-scientific tools to analyze and transform

these complex ecologies. Some of the living entities are phytoplankton (Greek φυτόν [phyt.], ‘plant'; πλαγκτός [planktos], 'wanderer, wanderer'): abundant keystone species and a vital part of the intricately balanced marine and terrestrial systems. Not only do they absorb and

convert the critically overproduced CO2, they now produce oxygen in quantities equal to that of all terrestrial plants; breathing us into being and connecting us to global ecologies. As the foundation of the oceanic food web, they provide organic matter for all other marine life. By determining the productivity of phytoplankton, marine scientists can also determine how much carbon dioxide is removed from the atmosphere.