The Blue Reef Chromis is hardy in nature and makes a good choice for a saltwater beginner aquarist. It is very active fish and need to be in small schools (shoals) of 6 or more. With its brilliant blue color and black outline along the bottom of the dorsal fin, the Blue Reef Chromis makes a captivating addition to any tank. It does well in most of the tank setups, but make sure not to keep it with overly aggressive tank mates or fish large enough to eat it. The Blue Reef Chromis is out in the open so much and it makes the shy fish in your tank more at ease. The Blue Reef Chromis eats zooplankton and accepts most types of marine fish food including frozen, freeze dried, vitamin enriched flakes and live foods. It is fairly disease resistant but still need to take proper pre-cautions and use a quarantine tank before introducing it into your main tank. Since it is easy to care for, the Blue Reef Chromis is a good choice for a beginner aquarist. It grows up to 5 inch and should be kept in a tank not less than 25 gallon. Since the Blue Reef Chromis is hard to distinguish a male from female, breeding is quite hard in captivity. Since it doesn?t bother any sessile invertebrates and corals, it makes a good reef tank inhabitant.