On June 19, Nathan Robinson was on board a research vessel in the Gulf of Mexico, surveying footage taken by the Medusa, a deep sea camera system. Shrimp, jellyfish, lantern sharks—the usual suspects—floated across the screen. But then, something utterly unusual crept into view: a tubular creature that suddenly unfurled its tentacles, wrapping them around the Medusa. Robinson raced to alert his colleagues to what he thought he had seen: a giant squid.