Pomacanthus navarchus is a deep-bodied angelfish from the Indo-Pacific, recognized instantly by the broad dark-blue girdle that sweeps across the face and forebody, outlined in vivid electric blue against expanses of bright yellow to orange-yellow. Juveniles look nothing like the adults, appearing dark blue with white to pale-blue vertical bars, and the change into adult dress is one of the more dramatic transformations among the large angelfishes. Aquarium specimens commonly reach around 10 inches, with a scientifically reported maximum near 11 inches. In the wild the species inhabits coral-rich lagoons, channels, and sheltered outer reef slopes between roughly 3 and 40 meters.

Adult housing should begin at 125 gallons, and larger, well-established systems suit this fish better as it fills out. Build the rockwork into caves, crevices, and secure retreats that a 10-inch angelfish can slip into, while preserving open lanes for unobstructed swimming; those same rock surfaces double as grazing territory. Because the species reacts poorly to unstable or declining water quality, prioritize pristine, well-oxygenated conditions and generous circulation. Care requirements sit at a moderate level, driven largely by the specialized diet and the need for a mature, stable aquarium rather than by any fragility in a settled specimen.