@Hix - this appears to be a juvenile Masked Booby.
Apparently in the 1970s and 80s in Hawaii the Masked Booby was known as the Blue-faced Booby, and the Sea Life Park was definitely calling them Blue-faced Boobies (from papers online).
Most likely. I wasn't much into boobies back then, otherwise I would have thought it was a brown booby.
Unfortunately I am unable to edit the title - can you do that @Chlidonias?