Fossils of giant octopuses have been discovered, suggesting that creatures of significant size, possibly up to 19 meters or 60 feet, existed in the Cretaceous seas. These large octopuses may have been apex predators that preyed upon other animals. The discovery has drawn comparisons to the legendary kraken, but the details of the findings, including the species and behaviors of these ancient creatures, are still being reported and may vary across different accounts.