Royal Grammas, Gramma loreto, are also known as the fairy basselet.  These are primarily imported from Haiti, and are one of the most popular and beautiful fish from the Caribbean.  They thrive on most foods, are not aggressive towards other fish, and don't get real big.  They do very well in reef tanks and will not bother corals and anemones.  The average size is about 1.5".  Unlike the grammas from Brazil, these can be kept together in aquaria and although they'll spar with each other, it is a non-lethal sparring.  They are very easy to care for and will thrive on most common marine fish foods.