There is no difference between yellow croaker and yellow croaker, yellow croaker is an alias of yellow croaker, both are the same kind of fish.

1. Classification: yellowtail and croaker belong to different families and genera. The large yellowtail belongs to the family Stenotrichidae and the genus Yellowtail, while the small yellowtail belongs to the family Stenotrichidae and the genus Yellowtail.

2. Morphological Characteristics: Although there are some similarities in the appearance of the greater yellowtail and the lesser yellowtail, there are differences in their body size, scale size, head shape, etc. The greater yellowtail is larger than the lesser yellowtail. The greater yellowtail has a larger body size and larger scales, while the lesser yellowtail has a relatively smaller body size and smaller scales.

3. Distribution range: The large yellowtail and the small yellowtail also differ in their distribution range. The greater yellowtail is mainly distributed in the southern Yellow Sea, East China Sea and South China Sea, while the lesser yellowtail is mainly distributed in China's Yellow Sea, Bohai Sea, East China Sea and the west coast of Korea.