Having two Philipines Regals and one Red Sea and one Indian Ocean Regals, I find that Regal angels are born yellow with the white and blue color developed as they age. Pacific Regal continue to have more white and blue while the Indian Ocean and Red Sea Regal have color development arrested at an earlier age. This result in a lighter fish in IO and RS and darker fish in the Pacific. Not only the chest of the Pacific fish blue, the blue bands and the white bands are wider, especially the blue ones. Brief glance at these fish, one will see a bluer, darker fish (IP) vs a lighter, more yellow fish (RS/IO)