1. Rays have a caudal or dorsal fin, whereas devil fish only have a cephalic or muzzle fin and do not have a caudal or dorsal fin.

2, compared with the devil fish, the ray's tail is a little thicker than the devil fish, and the gills of the ray are located in its lower part, and some of the devil fish's tail has poisonous spines, so the devil fish is aggressive.

3, rays and devilfish two body type also has a certain gap, the size of the ray is much smaller than the devilfish, usually rays can grow to 2.5 meters, but the devilfish can grow to a maximum of more than eight meters.