Yes there are 2 grade A and B according to ORA.
However there are many different breeders now aday, there are grade C, ultra and snowcasso. To me grade A is very nice pattern, but sometime you still find some few in complete and imperfection, like missing sideburn, the white patterns are too small..etc. This is where the ultra comes in; with more white and the patterns are better then the grade A.
Ultra grade is like one step below snowflakes; if you want stop by my shop and I love to show you the different. I didn't really came up with the ultra grade, this came from my customers.
There also numerous time, we received grade A from ORA, that the fish is missing fin or defective. You can ask Eddie. Stop by and I would love to show you the different.
Today ORA is not the only company that breed clown fish.