Argonaut – The Paper Nautilus

Unlike the true Nautilus, the Argonaut is an open-ocean octopus that creates a delicate, paper-thin shell—not as a home, but as a floating chamber to carry its eggs. Female Argonauts secrete this beautiful shell and use it to trap air, allowing them to float near the surface of the ocean.

These mysterious cephalopods have captivated sailors and scientists alike. Aristotle was one of the first to describe them, believing they used their arms as sails to navigate the sea. While this isn’t true, they do propel themselves by jet propulsion, like other octopuses.

Despite their ethereal beauty, Argonauts are little understood. Studying them provides insights into deep-sea adaptation and the evolution of mollusks. They remind us that the ocean is full of wonders yet to be fully explored.