Parasite fish that swim up penis
Candiru (Vandellia cirrhosa), also known as cañero, toothpick fish, or vampire fish, is a species of parasitic freshwater catfish in that it is dangerous to urinate in the river as the fish "springs out of the water and penetrates into the urethra by . Jump up ^ "Can the candiru fish swim upstream into your urethra (revisited)?".
Candiru – The fish that can swim up your penis?
Description:The Amazon is home to countless species of catfish, and several tiny, virtually transparent species have been labelled as candirus over the years. In it, Gudger, like von Martius before him, recounted old tales from South America, even though said tales were often third hand accounts of the stories and no person interviewed had actually witnessed this. The only documented modern case took place in , in Itacoatiara, Brazil. However, it was lodged in a native woman's vagina, rather than a male urethra. This is beyond far-fetched and for all intents and purposes impossible — the laws of fluid dynamics do not allow it. As WR Allen, a renowned Amazonian ichthyologist, put it: Of all of the beasts that prowl the Amazon , none is more feared by the locals than the candiru.