How Does Phytoplankton Get Energy?

How Does Phytoplankton Get Energy? Phytoplankton make their energy through photosynthesis, the process of using chlorophyll and sunlight to create energy. Like other plants, phytoplankton take in carbon dioxide and release oxygen. How does phytoplankton produce energy? Phytoplankton make their energy through photosynthesis, the process of using chlorophyll and sunlight to create energy. Like other