Groupers are a kind of fish with a stout muscular body and a big mouth. They are not long distance swimmers. They are also not sprinters although they can shoot for cover fast. They live around rocks, corals, wrecks (shipwrecks, planes, etc), and various undersea structures. They hunt for food within the vicinity of structures that provides them cover. They are known to just hide in wait to ambush a meal (fish, squid, prawns, etc.) that happens to swim by.