[Thanks to Ian.]Goliath tigerfish from the Congo River.
"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."