No, amberjack and jack crevalle are not the same fish. Amberjack is a species of saltwater fish found in the Atlantic Ocean, while Jack Crevalle is a species of large marine fish found mainly in tropical waters throughout the world. Both belong to the family Carangidae, but they have different characteristics that distinguish them from each other. Amberjacks are usually larger than Jack Crevalles and can reach up to 6 feet in length. They also have yellowish-brown coloration with dark spots on their bodies, whereas Jack Crevalles typically display silvery sides with black stripes running along their backs and fins.