More Candiru Catfish
Fish Swims Up Urine Stream (video) | Fish Attacks Man's Urethra (video)
Maximum Length: Up to 6 inches
The Amazon's Most Feared Fish: The Candiru is a terrifying fish, even when stacked up against its fellow river monsters of the Amazon. But this parasitic freshwater catfish does not instill fear by way of its monstrous size. On the contrary, it's small, eel-like and so translucent that it can be nearly impossible to spot in the water, which makes it even more terrifying. Some claim this fish is the most feared in the entire Amazon region, and the fear stems from the fact that it has a knack for finding open orifices and working its way inside. Once inside another organism, the Candiru feeds on its host's blood, becoming increasingly swollen. The Candiru is the star of an urban legend — which turns out to be true — of a man who was urinating in the Amazon River when a 6-inch Candiru swam up his urine stream into his penis. The fish remained there for days, until a surgeon was able to remove it.