The Orange Line Chromis (Acanthochromis polyacanthus), also known as the Spiny Chromis, is a small damselfish found among the Indo-Pacific Ocean, where they seek shelter among the corals and rocks of local reefs. Juveniles have grey or bronze coloration with horizontal, yellow lines that trace along their lateral line, along with black streaks on their caudal fin. Adults have a black or grey body with a white posterior. They do best if kept in pairs or small schools. They are peaceful, though they can show semi-aggressive or territorial behavior when paired and breeding. Their diet should consist of frozen, carnivorous food, such as mysis shrimp or krill. They do well in aquariums over 30 gallons and should have plenty of rocks to hide among.