Scientists who earlier proposed a second living species of the deep-sea cephalopod commonly called the vampire squid have reversed course. A new study published in the Bulletin of Marine Science finds the 2024 specimen described as Vampyroteuthis pseudoinfernalis is in fact the same species long known to science, V. infernalis.
What happened
In 2024, researchers announced the discovery of what they believed to be a previously undescribed living member of the ancient cephalopod order Vampyromorphida. The excitement was palpable: for more than a century the vampire squid had stood alone as the sole extant representative of that group. The putative new species was named Vampyroteuthis pseudoinfernalis and was described from an adult female collected in the South China Sea.
Two years later, a separate team re-examined the specimen and the evidence and concluded the animal matches the original species first described at the end of the 19th century, Vampyroteuthis infernalis. Their analysis and conclusions appear in the Bulletin of Marine Science, where they document why the newer name should not stand.
Why the correction matters
The reversal underscores two linked realities of modern biology: deep-ocean sampling is still yielding surprises, but taxonomy is also a self-correcting discipline that depends on careful comparison and peer review. When a single specimen prompts the naming of a new species, subsequent scrutiny—morphological, genetic or both—can confirm or overturn that decision.
- Historical context: The vampire squid was first described around 1898 by German zoologist Carl Chun, who sailed on the SS Valdivia during expeditions inspired by the earlier Challenger voyages and aimed to document life at depths below 550 meters.
- 2024 discovery: An adult female pulled from the deep South China Sea was proposed as a second living species, generating attention about hidden biodiversity in abyssal waters.
- 2026 reassessment: A reanalysis published in the Bulletin of Marine Science found the new name is redundant with the long-established V. infernalis.
What we know about the species
The animal colloquially called the vampire squid is neither a true squid nor an octopus; it occupies a distinct branch of cephalopod evolution and is remarkable for its webbed arms and dark, cloaklike appearance. Its scientific name, Vampyroteuthis infernalis, has been interpreted as meaning "vampire squid from hell"—an evocative label that reflects the creature's eerie form rather than any sinister nature.
"vampire squid from hell"
| Year | Event |
|---|---|
| ~1898 | Original description of V. infernalis by Carl Chun |
| 2024 | Specimen from South China Sea described as V. pseudoinfernalis |
| 2026 | Reanalysis published concluding specimen is V. infernalis |
Broader implications
The episode highlights both the promise and the pitfalls of deep-sea discovery. The abyss remains poorly sampled relative to shallower ecosystems, so isolated finds can hint at unknown diversity. At the same time, taxonomic decisions based on limited material can be revised when additional study compares new specimens against historical descriptions and type material.
For researchers and the public alike, the correction is a reminder that scientific names and classifications are hypotheses built from available evidence. As methods and comparative resources improve, so too can our understanding of where a specimen fits on the tree of life.
In this case, the vampire squid remains a solitary survivor of an ancient cephalopod lineage—but the story of the 2024 specimen illustrates how discovery and verification proceed hand in hand in modern marine science.
