Hairtail and saury are not the same fish.
The difference between the two:
1, saury can live in the sea, also can live in fresh water area, hairtail can only live in the sea;
2. Hairtail is basically the same width from the head to the tail. The shape of saury is like a small sharp knife, and it is generally small;
3. The living environment of hairtail is in the deep sea, and swordfish is in the semi-salty fresh water area near the sea;
4. Swordfish has little fishy smell, while hairtail has a heavy fishy smell.