The Atlantic porkfish is from the Family Haemulidae, and fishes from this family are commonly referred to by aquarists as grunts. They are called grunts because they make a “grunting” noise using their pharyngeal teeth and swim bladder (some sweetlips “grunt” as well). Grunts from the genus Anisotremus, like the Atlantic porkfish, are known as the smallmouth grunts, and the Atlantic porkfish does have a very small mouth. While its mouth may be small, the Atlantic porkfish can grow to 15 inches in length. The adult fish will need an aquarium of at least 175 gallons with plenty of swimming room. The Atlantic porkfish inhabits rocky bottoms and reefs and so should be kept in an aquarium with plenty of live rock and a cave or two in which to retreat. This fish also appreciates plenty of swimming room, especially as it grows. While many grunts prefer to be kept with other members of their species, the Atlantic porkfish has been known to be aggressive toward conspecifics when the tank is too small. Do keep juveniles with other peaceful tankmates, as they can easily be bullied. If you plan to add an adult Atlantic porkfish to a community tank with aggressive fishes, add the porkfish toward the beginning of your stocking order.