1, the color is different: the redfin snapper body is pink or red, the abdomen is lighter, the side of the body does not have any longitudinal bands, the reddish red snapper body reddish-brown, the abdomen is slightly lighter in color.

2, habits are different: the red snapper inhabits shells, sandy substrate sea area, or rocky reefs, coral reefs near the depth of 80 meters or less sea area, while the purple red snapper is distributed in the Indian Ocean and the South Pacific Ocean, China's distribution in the South China Sea, the southern part of the Taiwan Strait, do not group, with the seasonal changes in the short-distance migratory.