6 "Amazon Flesheaters" 10 May 2009 2 May 2010
Featured Animals: Piraíba catfish, Jaú catfish, Redtail catfish, Candiru, Candiru-Acù, Payara
Following a report of a fisherman swallowed whole, Jeremy Wade travels to South America in search of the Amazon's largest catfish: the Piraiba. Arriving there, Wade not only tries to catch this monster, but discovers that it belongs to a whole family of Amazonian killers. He finds the Candiru, a small blood-sucking catfish that has entered a man's body in the most horrifying of places, and the Candiru-Acù, a small catfish that swarms around and drills holes in dead or dying animals (including humans), eating them from the inside. Discovering the horrifying deeds of these fish only pushes him even further, until he faces off with the giant head of the murderous catfish family, the Piraiba.