We catch a few of these fish up this way out on the reef, mostly at night. They appear to be a Lutjanid of some sort, a cross between a Mangrove Jack, Large Mouth Nannygai and perhaps Red Emperor. The larger ones we've caught have a small hump on the head and we've got them to over 3 kilo so a nice fish and good eating like all Lutjanids. Apologies for the poor quality of the photo.