A 2026 study in Science describes fossil jaws attributed to early finned octopuses that lived in Late Cretaceous seas. From those jaws, the researchers estimated a total length of about 7–19 meters; the 19-meter figure is an upper estimate, not the measured length of a complete fossil animal. The fossils offer evidence of giant prehistoric octopuses, not proof that the legendary Kraken existed.
What did the 2026 study find?
The study, Earliest octopuses were giant top predators in Cretaceous oceans, examines large fossil cephalopod jaws from Late Cretaceous sediments. The fossils are approximately 100 to 72 million years old, according to the study.
The researchers attribute the fossils to two species of early finned octopus: Nanaimoteuthis jeletzkyi and Nanaimoteuthis haggarti. Relevant fossils came from Japan and Vancouver Island in Canada. The study interprets the animals as top predators, though the sparse octopus fossil record leaves much about their biology and ecology uncertain.
How big was the prehistoric octopus?
The study reports a calculated total-length range of about 7–19 meters. The largest figure is an estimate inferred from fossil jaws; no complete 19-meter animal was found and measured.
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| What was found | What the study estimates | What to keep in mind |
|---|---|---|
| Fossil jaws attributed to Nanaimoteuthis | Total length of about 7–19 meters | The body length is reconstructed from jaws, not measured from an intact animal. |
The Natural History Museum notes that the octopus fossil record is poor, which limits what scientists can establish about octopus evolution. That context makes the jaw-based estimate noteworthy, but it is still an estimate rather than a direct measurement.
Why compare it with the Kraken?
The Kraken is a legendary sea monster, not the scientific identity of these fossils. Comparing the animal to the Kraken is a way to convey its possible scale, not evidence that the myth described a real species.
The timing also rules out the fossil animal as the source of the historical legend: Nanaimoteuthis lived tens of millions of years before humans and the folklore associated with the Kraken. The study concerns fossil classification, estimated size, and possible ecology—not a mythical ship-attacking creature.
How does it compare with other ancient cephalopods?
The Natural History Museum provides context for the scale of ancient cephalopods. It reports that the ammonite Parapuzosia seppenradensis had a shell up to about two meters in diameter and that another cephalopod, Enchoteuthis melenae, may have reached roughly 12 meters. These are comparisons, not proof that the animals had the same body plan or ecological role.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minute| Animal | Reported size | Source and qualification |
|---|---|---|
| Nanaimoteuthis | About 7–19 m in total length | Science, 2026; calculated from fossil jaws. |
| Parapuzosia seppenradensis | Shell up to about 2 m in diameter | Natural History Museum; shell diameter, not body length. |
| Enchoteuthis melenae | Roughly 12 m | Natural History Museum; an estimate. |
What can scientists conclude?
The study presents fossil jaws from Late Cretaceous octopuses and uses them to estimate an unusually large possible body length. Its authors interpret the animals as top predators. The available evidence does not establish their exact body shape, precise diet, or detailed behavior, and the size estimate should not be treated as a direct measurement.
The key distinction is simple: the fossils support a real giant-octopus discovery, while “Kraken” remains a legendary comparison. The study does not show that the Kraken existed or that the fossil animals inspired the legend.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.FAQ
Did scientists find a complete 19-meter octopus?
No. The study describes fossil jaws and calculates a possible total length of about 7–19 meters from them. The upper figure is an estimate, not the measured length of a complete fossil.
What species are linked to the fossil jaws?
The study discusses two early finned-octopus species: Nanaimoteuthis jeletzkyi and Nanaimoteuthis haggarti.
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Where did the fossils come from?
Relevant fossils came from Japan and Vancouver Island in Canada, according to the study and its associated sources.
Was the prehistoric octopus the Kraken?
No. The Kraken is a legendary sea monster, while Nanaimoteuthis is the name of an extinct genus discussed in the study. The animals lived tens of millions of years before humans and Kraken folklore.
Did the study prove these octopuses were top predators?
The researchers interpret them as top predators. The sparse octopus fossil record means that much about their biology and ecological role remains uncertain.
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