For billions of years, the ocean has shaped life on Earth, forcing creatures to adapt and evolve remarkable skills to fight for survival. From tiny plankton to giant whales, marine life constantly adjusts to ever-changing environments and challenges.

Intelligence in the ocean takes many forms, from memory to communication, showing how different species solve problems uniquely. This intelligence may not exactly mirror our own but it reflects a staggering evolutionary success, helping animals thrive in diverse marine habitats across the globe.

From Cape Verde to Australia, South Africa to Greenland, meet scientists studying fascinating creatures, including octopi with nine brains and schooling fish who demonstrate collective decision-making, which provide a model for democratic decision making.