Mackerel Handling and Processing Mackerel is a slim caudal peduncle with forward pointed nose with thick and firm muscled. It has two large dorsal fins dark steel greenish blue with blue black head. They grow 14-22 inches long weigh from 1-4 pounds. The swift moving fish move in dense schools of thousands of fish in mackerel schools. They live in open sea with temperatures 10C to 20C. Importance of mackerel fish Mackerel is a delicious fish eaten worldwide for
