Locals say it's the only fish that doesn't fear the crocodile and that it actually eats smaller ones. It's also been known to attack humans in rare instances. It's so lightning quick and forceful that not only will it snap an angler's line, but it will sometimes make off with his or her tackle. No wonder one fishing safari promoter requires clients read a cautionary treatise on the Goliath before agreeing to a fishing trip.
SOURCE: iamalegend.hubpages.com, animal.discovery.com