PlanktoQuest was therefore developed to unveil the wonderful and complex microscopic world of plankton and raise awareness on plankton diversity and ecological significance. You can interactively explore inside marine microalgae (phytoplankton) by using your hands: you can choose and catch a swimming plankton, dissect the organelles and learn more from them, feed the plankton with nutrients, and do a 360° voyage inside a cell. We used 3D models from 3D electron microscopy data of different organelles of microalgae (chloroplast, mitochondrion, nucleus) covering different microalgal groups, such as coccolithophores, dinoflagellates, haptophytes. The immersion in the ocean was further amplified by real sounds from marine organisms.