Atlantic Blue Chromis

The a very peaceful and active fish from the Caribbean. These fish reside in the upper part of the aquarium and will help bring out more shy species that normally hide. A shoaling fish, should be maintained together in a group, and make a bright addition to the reef or fish only aquarium that is 30 gallons or larger. The Blue Chromis feeds on a variety of meaty items, herbivore preparations, and flaked food.
The diet should be varied and consist of meaty items, herbivore flakes, and frozen preparations. Using vitamin-enriched foods may help to preserve the bright color.
Source: Live Aquaria