Preparing for an expedition to the Southern Ocean is an adventure in itself. You gather your base layers, boots, goggles, socks, and pack your camera and lenses, envisioning the polar environment—one of the most extreme on Earth. Imagine the biting wind on your cheeks and the sight of albatrosses, prions, penguins, humpback whales, and orcas, thriving in such harsh conditions. The excitement is palpable as you prepare to study the microscopic world that sustains this vast ecosystem. Beneath the icy waters lies an invisible world of phytoplankton, microscopic organisms that are the unsung heroes of the marine ecosystem. Despite their size, phytoplankton play a colossal role in maintaining life on Earth.