Home » Animal » Black Cardinalfish Black Cardinalfish Cardinalfish, Marine Fish Latin name: (Apogonichthyoides melas) Care Level Easy Temperament Peaceful Color(s) Diet Carnivore Preferred Conditions Easy Avg. Max Size 4½" Minimum Tank Size 30 gallons Family The Black Cardinalfish is a beautiful fish that comes from the reefs of Indonesia. It has a long slender shape and is mostly black in color. The large black eyes of this fish are complimented by spots on the fins of similar size.