For centuries, sailors told fantastic tales of nighttime seas glowing steady and bright from horizon to horizon. Mariners called the strange phenomenon the “milky sea.” Milky seas are even mentioned in the most famous ocean exploration books of their time, 'Moby Dick' and '20,000 Leagues Under the Sea,' alongside mythical creatures like mermaids and kraken. We now know that milky seas are real, but they’ve only ever been sampled by scientists once (in 1985), and only one set of blurry photos exists. We have teamed up with groundbreaking scientist, Steve Miller, who is the first person to spot and track milky seas using satellites. For the past year we’ve been filming with Steve and his collaborators, including microbiologists, ocean currents experts, and keepers of Indigenous knowledge for a feature-length documentary film about the decadeslong quest to understand how and why milky seas form. Steve’s ultimate goal is to spot an Indonesian milky sea via satellite, deploy to it, and sample it in 2025 -- and our goal is to document it all for our feature film, and make a standalone short film about the expedition for Explorer. The milky sea phenomenon is one of the great natural wonders of the ocean, and our subject is intent on unlocking their secrets. If we capture a milky sea on film for the first time ever, it would break the internet -- not to mention, studying one would lead to countless new avenues of scientific inquiry.