Monstrous octopuses of prehistoric times, as large as modern whales, roamed the ancient oceans during the era of dinosaurs. Fossils discovered in British Columbia and Japan suggest these colossal creatures, reminiscent of mythical sea monsters like the Kraken, reached lengths of up to 19 meters, comparable to the size of a sei whale. A recent study published in the journal Science reveals details about these ancient sea creatures.
One of the identified species, named Nanaimotethis haggarti, is believed to have been among the largest invertebrates in Earth’s history. This finding challenges the record held by the modern giant or colossal squid, which typically reaches lengths of around 12 meters. The fossils of these ancient octopuses exhibit wear patterns on their beaks, indicating their capability to consume heavily protected prey, including those with hard shells.
Researchers suggest that Nanaimotethis likely used its massive body and long tentacles to capture prey, while its powerful jaws were adept at crushing hard structures such as shells and bones. This discovery sheds light on the diverse top predator community of the ancient seas, where giant invertebrates like octopuses played a significant role alongside other formidable marine predators.
The study also unveils intriguing insights into the behavior of these ancient octopuses. Analysis of the fossils suggests a preference for grabbing prey on one side, hinting at a level of handedness associated with intelligence. This observation raises questions about the intelligence and behavior of these prehistoric creatures, similar to modern octopuses known for their high levels of intelligence.
The fossils were discovered in rock formations in British Columbia and Hokkaido, Japan, with some specimens housed at the Courtenay and District Museum and Paleontological Centre. The fossils, mainly beaks or jaws, provide rare insights into the ancient octopuses, as soft-bodied creatures like octopuses rarely fossilize. The study utilized advanced techniques like digital fossil mining to create detailed 3D models for analysis and comparison with modern octopus species.
These ancient octopuses, estimated to have lived between 100 to 72 million years ago, represent some of the oldest known octopus fossils, challenging existing understanding of octopus evolution. The significant differences between these ancient octopuses and their modern counterparts raise intriguing questions about the evolution and adaptations of octopuses over millions of years.
