Judging by the size of the fish to the cup it is in, it is still quite small so at this point it would be hard to tell for sure what it is. However, I would say it is either a PK or a VT. I am leaning more toward PK with the anal fin being as even and level as it is. Might be a bit early to tell sex too. A picture with the ventral fins completely down could help with that since males have much longer ventral fins especially with PK.