The goliath tigerfish is one of the most fearsome freshwater fish in the world and said to be a much bigger and deadlier version of the piranha.
The giant fish has 32 teeth that are of similar size to those of a great white shark and has been known to attack humans and even crocodiles.
It has only ever been caught by a handful of fishermen due to the danger it poses and the fact its habitat is notoriously hard to reach.
'The teeth on it are incredibly sharp and are about the same length as a great white shark.
'It also has an extremely powerful bite and has been known to consume prey the same size as itself, attack people and take pieces out of crocodiles.
'It is thought that these fish attack in a reflex response to a sudden movement or splash.
'It is very rare to catch one, especially by an outsider because they are found in such a remote and difficult location to get to. There are no guides or lodges on that part of the Congo River.'
'It is a very dangerous fish to handle. If you aren't careful it could easily take your finger off or worse,' he added.