A sketch of the giant octopus.
Image: Yohei Utsuki
Department of Earth and Planetary Sciences
Hokkaido University.
Department of Earth and Planetary Sciences
Hokkaido University.
To a conspiracy-theorist creationist who sees science as an organised plot to trick them into changing their mind, it must seem that the whole world and its dog are ganging up on them. The “conspiracy” has now spread to a team of researchers led by Shin Ikegami of Hokkaido University, Japan, who have announced the discovery of fossilised jaws of giant octopuses that may have been apex predators in Late Cretaceous seas, about 100 million years before creationism’s mythical “Creation Week”. Some of these animals may have reached nearly 20 metres in length, making them among the largest invertebrates yet described.
To a creationist, apparently, it is more plausible to believe that a god self-assembled out of nothing, then made an entire universe out of nothing by magic just a few thousand years ago, than to accept that Earth and life on it are the result of long, slow, scientifically demonstrable natural processes. So, when the evidence says otherwise, the evidence must somehow be forged, misrepresented or misunderstood. Besides, Bronze Age people who thought the world was flat, with a solid dome over it, said so — and what better evidence could there be than that?
What the team of researchers from several Japanese research institutions, together with Jörg Mutterlose of Ruhr University Bochum, Germany, discovered was recently published in Science. Using high-resolution grinding tomography and an artificial intelligence model, they identified fossil jaws hidden inside rock samples from the Late Cretaceous period. The fossils, from Japan and Vancouver Island, date from between about 100 and 72 million years ago. They had been preserved in calm seafloor sediments, retaining fine details, including wear marks that reveal how these animals fed.
Based on the size and shape of the jaws, the researchers estimate that some of these extinct finned octopuses, especially Nanaimoteuthis haggarti, may have reached nearly 20 metres in total length. Their jaws show heavy chipping, scratching, cracking and polishing, consistent with repeated forceful biting into hard prey such as shells, bones or other resistant material. These were not passive, soft-bodied animals drifting harmlessly through the Cretaceous seas; they appear to have been powerful, active predators, competing in ecosystems otherwise assumed to have been dominated by large marine reptiles and sharks.
One especially intriguing finding was asymmetrical wear on the jaws. In two species, one side of the biting surface was more heavily worn than the other, suggesting that these animals may have favoured one side when handling difficult prey. This sort of behavioural lateralisation is associated in modern animals with complex neural processing, raising the possibility that advanced predatory behaviour, and perhaps a degree of intelligence, had already evolved in these early octopus relatives. The discovery also pushes the fossil record of finned octopuses back by about 15 million years, and the broader octopus record by about 5 million years.



































