Scientists have uncovered two brand new species of fish in the Amazon rainforest with a bizarre body feature that sets them apart.
The tiny fish, part of the Priocharax genus, are under an inch long but sport a thin flap of disc-like skin between their pelvic fins, creating a curtain-like shape beneath their bodies.
The discovery challenges the long-held belief that very small creatures lose complexity in their anatomy over time, as reported by Need To Know.
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Researchers from the Federal University of São Carlos said: “The analysis of material collected during recent expeditions, combined with the examination of specimens already deposited in collections, has revealed the existence of two new Priocharax species from the region.
“Moreover, the proximity of both species sampling sites to Brazilian protected areas highlights the importance of these units for understanding biodiversity and conserving fish species.”
The findings underline the importance of ongoing research in the region and the need for stronger conservation efforts to protect unique species like the Priocharax Rex.
Exactly what the strange flap does remains unclear.
Experts suggest it could play a role in mating as a form of communication or act as a stabiliser while the fish navigates the riverbed.
Further study will require researchers to return to the Amazon and observe the fish in its natural habitat.
The unusual new species were collected from a blackwater stream in southern Colombia, near San Rafael.
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