FAMILY - Pomacanthidae SCIENTIFIC NAME - Centropyge Vroliki COMMON NAME - Halfblack or Pearlscale Angelfish SIZE - 3.5" (9 cm) RANGE - Christmas Island, Sumatra east to the Marshall Islands and Vanuatu, north to Southern Japan, and south to Lord Howe Island. MIN. AQUARIUM SIZE - 55 US Gal. (208 L) FOODS AND FEEDING - Grazes algae and sponges off hard substrates. AQUARIUM SUITABILITY - 8 REEF COMPATIBILITY - Poses a moderate threat to soft and large polyped stony corals. CAPTIVE CARE - Feed 2-3 times a day. Accepts a wide range of aquarium foods. Can be aggressive to other docile tankmates, This should be the only pygmy angel in the tank unless the tank is large with plenty of hiding places exist.