I see how clueless you are my friend. This would be a simple explanation for you. Paroon sharks are in the catfish family, it's like a Red Tail Arowana, Green Arowana, And Silver Arowana are all arowanas. Yes they do have individuality, but also have characteristics which is found solely for an aro, likewise for a catfish. Though it doesn't mean that a catfish named Paroon sharks are now to be called as genuine sharks, no. They're not real sharks, they are still catfish. Catfish in nature would be predatory, it means it would be carnivorous, and as a carnivore you wouldn't have all the days to be at luxury to have a buffet of what ever food the fish would want to eat, unless it's in season or the fish would eventually hunt it's food or wait and predate food according to what kind of way a catfish eats.
Simply means, in the wild, there are times that food is scarce, means they have to go fasting for weeks up to months in order to survive. They're design to be like that, and they are like that.