The Yellow Assessor, Assessor flavissimus, also known as the Gold Assessor, the Gold Assessor Basslet, or the Golden Mini Grouper is a relatively rare fish to be imported to the US. Native to the coastal waters of Australia, the Yellow Assessor is a peaceful species that thrives well in most established reef aquariums. They thrive with plenty of live rock hiding places, a balanced carnivorous diet, and should be kept as only one individual in the tank.