This is a true altum angelfish, Pterophyllum altum.  It’s been in my fish room for 3 months, gone through quarantine and is doing well.  Body is quarter to half-dollar size.  Forehead is the classic ski jump shape, and long, long, long, long dorsal and anal fins.  But I went overboard and got too many, and a few have got to go.  I paid $70 each.  Minimum is set at $30.  (The May membership program will discuss raising and spawning altum angels.)