2. Difference of fins: From the appearance, although ray and devil fish have some similarities, if you look closely, they are still different in many places. For example, their fins are very different. Rays have tail fins and a big tail. They also have dorsal fins. But devil fish don't have these two fins. They have head fins and snout fins. The shape of their head fins is very strange, much like the two wings of bats, hence the name.
3. Body shape difference: Rays and devil fish are also different in body shape. Rays are smaller than devil rays, and the older ones are only about 2.5 meters in adulthood. The devil fish will be much bigger, and the larger devil fish will be about 8 meters long in adulthood.