Distribution area, morphological characteristics.

1. According to the China Biological Network, sardines are small fish that like to live in groups and live in offshore areas. Mackerel, a fish that likes to live in groups, lives in ocean areas and the Mediterranean area.

2. Sardines are small fish, measuring 15 to 30 centimeters, while mackerel is stout and cone-shaped, with a body length ranging from 20 to 40 centimeters.