1. Appearance difference: saury is slender, with flat side, blue-gray back, silvery white abdomen and black spots on its body surface. Saury is short, with flat side, blue-green back, silvery white abdomen and black longitudinal stripes on the side.

2. Differences in ecological habits: saury is mainly distributed in the warm waters of the Pacific Ocean and the Indian Ocean. It is a migratory fish, inhabiting the offshore surface waters and feeding on plankton instead of small fish. Saury is mainly distributed in the warm waters of the Pacific Ocean and the Indian Ocean. It is also a migratory fish, inhabiting offshore surface waters and feeding on plankton and small fish.