Hello, Pacu are not so easy to ranch, mainly because they eat so much but that's not all, there are many other problems that I've solved with my fish'o'matic. First important point : Pacu exists ! Yes ! Pacu exists and it have human teeth !!! Fortunately, in Oxygen Not Included, we don't have dentist, so you don't will have to manage it dental caries.    How Pacu renews its species in the wild without eating? In the natural pool, Pacu have the time to