Mackerel Names: Mackerel, Pacific Mackerel, Indian Mackerel, Atlantic Mackerel, Horse Mackerel Seasonal Period: October until the following February Catching Method: Purse and Trawl Fat Content: 20-23% in October falling steadily to 18-20% in February Products: Whole frozen mackerel, Machine cut mackerel flaps, Headed and gutted mackerel and Machine cut mackerel fillets Whole Fish Grading Sizes: Whole fish grading sizes: 200-400g | 300-500g | 400-600g | >600g (or to customer specification) Flap and fillet grading sizes: to customer requirements Packaging: Whole fish: 20Kg Printed cardboard cartons and high density plastic.