Candiru (English and Portuguese) or cañero (Spanish), also known as toothpick or vampire fish, are a number of genera of parasitic freshwater catfish in the Trichomycteridae family. All are native to the Amazon River. Although some candiru species have been known to grow to a size of 40 centimetres (16 inches) in length, others are considerably smaller. These smaller species are known for an alleged tendency to invade and parasitize the human urethra by swimming up the urine stream. However, despite ethnological reports dating back to the late 19th century, the first documented case of the removal of a candiru from a human urethra did not occur until 1997.