Gramma loreto Royal Grammas is an excellent choice for a reef aquarium or small fish only tank. A single specimen should be housed in a minimum of a 30 gallon tank, while a school requires at least 55 gallons to thrive. Because the Royal Gramma Basslet is a deep-water dweller, a somewhat subdued lighting arrangement is best. When housed in a group, the male will usually be larger than the female. It can become territorial with time. As a carnivore, the Royal Gramma Basslet will do well on a varied meaty diet.