Black Ocellaris has black face and fins, essentially ALL black with no orange. Onyx Percula has orange face and orange on fins.
The pasterns of DaVinci and Picasso mutations are different. If you see a few, you recognize it. DaVinci is an Ocellaris mutation and Picasso is a Percula mutation. DaVinci has additional white marks that are foward slashes from the head down, while the Percula increase white are extention of the bars in the middle almost all of the time, but orcadional horizontal extention from the top of the bard, but does not have that forward slashes like DaVinci,
Your new fish has no orange what so ever, and has that foward slashes that is clasic for DaVinci Black Ocellaris.