What is a candiru?

The candiru, also called the carnero fish, is a tiny parasitic catfish that inhabits the waters of South America. They can reach lengths of 1-2.5 in (2.5-6 cm) with a width of 3.5 mm. Their diminutive size and nearly transparent body makes them very hard to locate (not that you would want to). The candiru has sharp bones with a series of spines located around the head used while feeding.