King Mackerel are grey - silvery on the sides with a long slender body with no black pigment on front of dorsal fin like the spanish mackerel. Young are often confused with spanish mackerel because spanish mackerel and young king mackerel are about the same size and both have the goldish spots. Spot disappear as the king mackerel grows larger.
King Mackerel can be found cruising in schools near the beach to far offshore. They reach sizes approaching 100 pounds but most fall in the 15 to 35 pound catagory with a 50 pounder being a very large specimen.