10 - 130 pounds
35" - 60"
The Longfin Yellowtail, also known as the Almaco Jack, is notable for its dusky dorsal coloring, ranging from brown or silvery blue-green to olivaceous, and the amber strip on its side. Compared to other jack fish species, the Longfin Yellowtail has a more flattened and less elongated body.
The dorsal and anal fins of the Longfin Yellowtail are elongated with their outer edges sickle-shaped. The first rays of the dorsal fin on the Longfin Yellowtail are longer than its dorsal spines, while with other jack species, the reverse can be said.
The Greater Amberjack is similar in appearance to the Longfin Yellowtail. The best way to distinguish them is to look at the second dorsal fin. Compared side by side, the second dorsal fin on the Longfin Yellowtail is much higher.
Most commonly found Longfin Yellowtail can measure up to 35 inches in length, with weight from 10 to 20 pounds. The fish can grow up to 60 inches and 130 pounds. The Longfin Yellowtail is carnivorous. It feeds day and night and is a fast-moving predator. It prefers to feed on bony fishes, particularly baitfish and invertebrates such as squid and shrimp.