not only 3 but the top predators in my opinion
RTC--> for sure a fish that eats anything that is not bigger than them
Giant snakehead--> a damn agressive fish that kills anything it sees and eat them hole or tear them apart
Wels--> if you stay unmoved in this fish face you end up in his stomach ...huge fish and huge mouth
Armatus -- > sharpest teeth ever
African tiger fish--> big mean and hungry ..terminator
wolf fish--> well trained hunter
pike--> any fish is a potential food
gator gar -- > big fish , long mouth , big teeth big apettie