Scientists have recently uncovered that giant octopuses, reaching lengths of up to 19 meters (62 feet), were the true apex predators of the ocean during the dinosaur era.
In a groundbreaking study published in the magazine Science, researchers examined the fossilized jaws of two octopus species: Nanaimoteutis Zeretsky and N. Hagarty. These fossils were recovered from Late Cretaceous deposits dating back 100 million to 72 million years ago.
The extensive wear observed on the jaws of these adult specimens indicates that these colossal creatures were powerful, active carnivores, capable of crushing hard shells and bones. The largest octopuses of this time rivaled the size of the ocean’s largest marine reptiles.
According to Yasuhiro Iba, an associate professor at Hokkaido University, “They lived in the oceans during the age of the dinosaurs, alongside marine reptiles, large fish, sharks, ammonites, and large-shelled animals” as reported by BBC Science Focus.
Nanaimoteutis likely utilized its impressive size and extended arms for capturing prey while employing its powerful jaws to crush shells and bones, making it a formidable, intelligent predator at the top of the ocean food web.
In their research, scientists discovered 12 previously hidden octopus jaws through an innovative technique called digital fossil mining. This method transforms the interiors of rocks into high-resolution image datasets, allowing AI to create 3D models of fossils.
According to Iba, this advanced method can enhance fossil discovery rates by over 10,000 times compared to traditional techniques.
The asymmetrical wear on these jaws suggests a potential unilateral preference, indicating that these ancient octopuses may have exhibited behaviors similar to modern species, such as arm and eye preference, implying a remarkable level of intelligence.
These remarkable creatures might be the largest invertebrates ever recorded, earning Iba’s team the nickname “Cretaceous Kraken.”
However, the descendants of these octopuses now inhabit the depths of the ocean, having been displaced by newer generations of apex predators.
As Iba noted, “It was probably overtaken by a modern predator, such as a whale.”
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Source: www.sciencefocus.com
