While most Tigerfish species are not known to be dangerous to humans, the Goliath Tigerfish is a scary exception. Citing recorded instances in the Congo River where unsuspecting swimmers have been preyed upon, it is the only African freshwater fish that is actually known to attack humans. Its mouth doesn't have any lips with the teeth set along the edge of its jaw fitting into distinct grooves. It preys on any fish it can overpower including smaller members of its own species and small crocodiles