The myth of the fish that swims into your bladder
In short: You may have heard of the Candirú, a fish rumored to swim up the human urethra. This video investigates the reality behind this bizarre Amazonian legend and explores whether the creature actually behaves as described.
The Candirú, also known as the pencil fish or vampire fish, is a thin, translucent species from the Amazon. It is infamous for the claim that it swims into the urethra of humans to lodge itself inside.
While the legend is widespread, the video examines the biological and behavioral reality of these fish. Understanding the distinction between folklore and aquatic biology helps clarify whether this specific interaction is a documented fact or a persistent myth.
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Sources
- Summary by Intellect · source: Is There Really a Fish That Swims Up Your Urine and Into Your Bladder in the Amazon?
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