The Yellowbar Angelfish, also commonly called the Maculosus Angelfish or Yellowblotch Angelfish, is a striking large marine angelfish scientifically known as Pomacanthus maculosus. Native populations occur primarily in the western Indian Ocean, including the Persian Gulf, Red Sea region, East Africa, and waters extending south toward Mozambique. The species inhabits reef-associated environments and is recorded from approximately 4–60 meters in depth.
Juveniles are dramatically different from adults. Young fish display a deep blue to nearly black body crossed by brilliant blue and pale vertical lines. As the fish matures, this juvenile pattern gradually transforms into the characteristic adult coloration, which includes a prominent yellow vertical band or blotch on the body.
This specimen is captive bred, offering aquarists the advantages associated with fish produced in controlled aquarium conditions. Pomacanthus maculosus is a robust, long-lived angelfish but becomes a very large fish and should be purchased with its adult size in mind. FishBase documents a maximum size of 50 cm standard length, approximately 19.7 inches, and a maximum reported age of 36 years.
Because this species naturally consumes benthic organisms including corals and sponges, it should not be considered reliably reef safe. Research on wild P. maculosus populations has documented substantial consumption of coral and sponge material.
Care Guide
Scientific Name: Pomacanthus maculosus (Forsskål, 1775)
Common Names: Yellowbar Angelfish, Maculosus Angelfish, Yellowblotch Angelfish
Family: Pomacanthidae
Care Level: Moderate
Temperament: Semi-aggressive
Reef Compatibility: Not reliably reef safe
Minimum Aquarium Size: 250 gallons recommended for long-term adult care
Maximum Size: Up to approximately 19.7 inches / 50 cm standard length
Diet: Omnivore with strong natural feeding on benthic invertebrates, especially corals and sponges
Temperature: Approximately 74–80°F
Specific Gravity: 1.023–1.026
pH: Approximately 8.1–8.4
Aquarium Requirements:
Provide a large, mature aquarium with substantial swimming room and a generous amount of rockwork containing caves and retreats. Because these fish grow large and can become territorial, long-term housing should be planned around the adult rather than juvenile size. Captive-care recommendations vary from roughly 150 gallons upward, but around 220–250 gallons or larger is a more appropriate long-term recommendation for a fish capable of approaching 20 inches.
Diet and Feeding:
Offer a varied diet several times daily. Appropriate foods include quality marine angelfish preparations containing sponge material, mysis shrimp, enriched marine foods, pellets, spirulina-based foods, nori and other marine algae. Although aquarium diets commonly contain vegetable matter, studies of wild P. maculosus show substantial feeding on corals, sponges and other benthic organisms, so a varied diet is particularly important.
Temperament:
Generally semi-aggressive, especially as it grows. Provide ample territory and exercise caution when housing it with other large angelfish or timid species.
Reef Compatibility:
Not recommended as reef safe. Individuals may nip or consume corals and other sessile invertebrates. The species' documented natural diet includes coral and sponge tissue, making the risk more than simply an aquarium anecdote.
