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clock-iconPUBLISHEDJuly 17, 2025
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A Shrimp That Lives In A Tree? Indonesia’s Cyclops Mountains Are Home To Some Seriously Strange Wildlife

“Though some might describe the Cyclops as a ‘Green Hell’, I think the landscape is magical, at once enchanting and dangerous, like something out of a Tolkien book.”

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Rachael Funnell

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.

Senior Science Writer

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.

View full profile
EditedbyHolly Large
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Holly Large

Copy Editor & Staff Writer

Holly has a degree in Medical Biochemistry from the University of Leicester. Her scientific interests include genomics, personalized medicine, and bioethics.

cyclops mountains in the distance lots of wild green space

A strange shrimp was found in the soil and trees high up on the slopes of the Cyclops Mountains.

Image credit: Tamara Louraine / Shutterstock.com


Indonesia’s Cyclops Mountains are not for the faint of heart. Scientists who have gone on expeditions here have been rewarded for their efforts with everything from leeches stuck to their eyes, to malaria, earthquakes, exhausting heat, and a few venomous animals to boot. Still, they did strike gold when they discovered a tree-dwelling shrimp.

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Yes, in 2023, an entirely new genus of shrimp was discovered during a mountain expedition in Papua. It was a surprise find for the scientists, who hadn’t been expecting to find such a crustacean so high up the Cyclops Mountains, least of all one that belongs to a lineage that are normally found on the seashore.

“We were quite shocked to discover this shrimp in the heart of the forest, because it is a remarkable departure from the typical seaside habitat for these animals,” said lead entomologist for the expedition Dr Leonidas-Romanos Davranoglou (a Leverhulme Trust Postdoctoral Fellow at the Oxford University Museum of Natural History), in a statement

“We believe that the high level of rainfall in the Cyclops Mountains means the humidity is great enough for these creatures to live entirely on land.”

A new species of terrestial shrimp, found in the soil and in the trees of the Cyclops Mountains. This shrimp belongs to a lineage that is normally found on the seashore, and it was an enormous surpise to the expedition team when it was discovered living hundreds of meters high up on th slopes of the mountains.
Finding a shrimp from a lineage typically associated with the seaside was an enormous surprise to the researchers.
Image credit: Expedition Cyclops

Your standard shrimp breathes using gills to extract oxygen from water and, depending on the species, will either live in marine or freshwater environments. To be thriving so far inland must mean this new genus has adapted a way to breathe without being fully submerged in water, as Davranoglou says, perhaps aided by rainfall or humidity.

The expedition was one for the history books in a number of ways, reanimating a species that was thought to have been extinct since the 1960s: Attenborough’s long-beaked echidna, Zaglossus attenboroughi. Named after wildlife broadcaster and natural historian Sir David Attenborough, the monotreme made a surprise appearance on camera traps left in the Cyclops Mountains.

Attenborough's long-beaked echidna, photographed by a camera trap.
Attenborough's long-beaked echidna, photographed by a camera trap.
Image credit: Expedition Cyclops

Suffice to say, the team was owed a few wins, as several were affected by injury and illness during the expedition. Davranoglou’s arm was broken in two places while another team member contracted malaria, and a third had a leech stuck to their eye for a day and a half before a hospital team could remove it. In spite of all that, they've lost no love for the perilous landscape.

“Though some might describe the Cyclops as a ‘Green Hell’, I think the landscape is magical, at once enchanting and dangerous, like something out of a Tolkien book,” said expedition lead Dr James Kempton of Oxford University. “In this environment, the camaraderie between the expedition members was fantastic, with everyone helping to keep up morale. In the evening, we exchanged stories around the fire, all the while surrounded by the hoots and peeps of frogs.”


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