Scientists Found a ‘Giant’ Cave Creature In Australia With 11 Claws — It Fits On Your Fingernail
When researchers announced they’d discovered a giant cave creature with teeth and claws in Australia, you’d be forgiven for picturing something terrifying. Something with fangs. Something enormous.
Now imagine that creature sitting comfortably on your pinky fingernail.
A team of scientists has identified a new species of crustacean deep inside a cave in Australia’s Northern Territory. Despite its fierce-sounding description, the animal measures nearly 6 millimeters in length — roughly the width of a standard pencil eraser. In the world it inhabits, though, scientists consider it a giant.
What Makes a 6-Millimeter Creature ‘Giant’
The species, formally named Megabathynella totemensis, was described in a study published in May 2024 in the European Journal of Taxonomy. It belongs to a group of crustaceans known as Bathynellacea, where size is very much relative.
“Here, we consider species larger than 4 mm to be ‘giant’ and those of 2.5-4 mm to be ‘large,’” according to the study.
At nearly 6 millimeters, Megabathynella totemensis genuinely earns the title among its peers. Most of its relatives are considerably smaller. The gap between the word “giant” and the reality of a creature you could lose between your couch cushions is part of what makes this find so striking. Nature has a sense of scale all its own.
Armed With Up to 11 Claws
Small doesn’t mean defenseless. This creature comes fully equipped.
According to the study, Megabathynella totemensis has a segmented body featuring “protruding” teeth and “well-developed” claws. Not just a few claws, either.
“The new genus has numerous claws, … up to 11, and only some species of Billibathynella come close, with 10 claws, but the most common state is seven claws,” the study states.
That means this tiny crustacean is packing more claws than nearly any of its known relatives. Researchers also reported the species has “enlarged” spines along the inside wall of the thorax.
Then there’s its appearance. At least 80 translucent organisms were observed swimming in shallow pools inside the cave. Dozens of ghostly, see-through bodies gliding through dark underground water, armed with teeth and claws, completely hidden from the world above.
Where the Species Was Found
The discovery took place in Totem Pole Cave, located in the Pungalina karst area along the Gulf of Carpentaria on the northern coast of Australia. Karst landscapes are known for their underground drainage systems, caves, and sinkholes — environments where unusual species can thrive in isolation, far from sunlight.
Researchers spotted the translucent crustaceans swimming in the cave’s shallow pools, eventually collecting and studying specimens that led to the formal identification of a species entirely new to science.
The creature’s scientific name reflects both its size and its home. Researchers said the species’ “unusually large” size contributed to its name. The genus name Megabathynella derives from the Greek word μέγας, meaning big. The species name totemensis refers directly to Totem Pole Cave.
What This Discovery Hints At
The find raises questions about what else might be living in unexplored caves and underground waterways around the world.
“As new species continue to be discovered and described in Australia and around the world, it is interesting to observe that large and giant species (of Bathynellacea) occur on every continent,” researchers said. “It is likely that numerous new species will be discovered in these and other countries with further survey of prospective habitats, as is the case in Australia. Future studies could explore the factors that lead to this unusually large size and proliferation of articles and setae observed.”
Every continent has its own version of these creatures, and many of them almost certainly haven’t been identified yet. The caves, the underground rivers, the shallow subterranean pools — they hold life that science is only beginning to catalog.
A Matter of Perspective
There’s something satisfying about this discovery. The word “giant” primes us for something massive, and instead we get a translucent crustacean smaller than a pea, one that’s been quietly living in an Australian cave, armed to the teeth (literally), completely unknown until now.
In the world of Bathynellacea crustaceans, Megabathynella totemensis is a genuine outlier — bigger, clawier, and toothier than most of its relatives. On a daily walk, you’d never see it.
Somewhere in the Northern Territory of Australia, in the dark, still pools of Totem Pole Cave, at least 80 tiny translucent creatures are swimming around right now — with their 11 claws, their protruding teeth, and their enlarged spines — completely unbothered by the fact that the rest of the world just learned they exist.
Production of this article included the use of AI. It was reviewed and edited by a team of content specialists.
