The Scribbled Angelfish, known scientifically as Chaetodontoplus duboulayi, is a stunning saltwater species that captivates marine aquarium enthusiasts with its vibrant blue body, irregular “scribbled” yellow lines, and elegant, graceful swimming. Native to the Indo-Pacific waters, this species is a favorite among advanced aquarists due to its striking appearance and unique personality.
Let’s dive into everything you need to know about this majestic marine fish—from its natural habitat and behavior to aquarium care, breeding, and compatibility.
Common Name and Latin Name
Common Name: Scribbled Angelfish
Scientific Name: Chaetodontoplus duboulayi
Native Region and Habitat
The Scribbled Angelfish is native to the warm tropical waters of:
Northern Australia (Great Barrier Reef and Coral Sea)
Papua New Guinea
Indonesia
In the wild, they inhabit coastal reefs and lagoons, often near sponge-covered rock formations, where they can graze and find cover. They’re usually found at depths of 5 to 35 meters.
Size and Lifespan
Adult Size: Up to 10 inches (25 cm)
Lifespan: 10–15 years in captivity with proper care
Diet
Scribbled Angelfish are omnivores with a preference for:
Sponges and tunicates (main diet in the wild)
Marine algae
Prepared angelfish formulas
Mysis shrimp, brine shrimp, and other protein-rich frozen foods
Because of their sponge-based natural diet, a mature reef system or high-quality marine food enriched with sponge matter is essential for long-term health.
Sexing and Dimorphism
Sexing this species is not always straightforward, but adult males tend to have more vivid coloration and slightly larger body size. Males also develop more pronounced streamers on the tail fin compared to females.
In captivity, determining sex may require observation over time or comparison between individuals.
Breeding
Breeding the Scribbled Angelfish in captivity is rare and challenging due to:
The need for large, deep tanks for pair formation
Difficulty in mimicking natural spawning conditions
Lack of well-documented captive breeding programs
In the wild, they are believed to be broadcast spawners, releasing eggs and sperm into open water at dusk.
Reef Compatibility: Is It Reef Safe?
Reef Safe: With caution
Scribbled Angelfish have a reputation for nipping at soft corals, large-polyp stony corals (LPS), and clam mantles. While some individuals may coexist peacefully in a reef environment, others may not.
They are better suited to:
FOWLR tanks (Fish-Only With Live Rock)
Cautionary mixed reef tanks with careful observation
Community Tank Suitability
Temperament: Semi-aggressive
Good for Community Tanks: Yes, with compatible tank mates
Scribbled Angelfish can coexist peacefully with many other species if properly introduced and given ample space. Avoid housing with overly aggressive fish or other angelfish of similar size unless in large systems.
Compatible Tank Mates Include:
Tangs (e.g., Yellow Tang, Kole Tang)
Larger wrasses
Foxface Rabbitfish
Anthias
Clownfish (in groups)
Gobies and blennies (as long as territories don’t overlap)
Water Conditions
Temperature: 72–78°F (22–26°C)
pH: 8.1–8.4
Salinity: 1.020–1.025 specific gravity
Ammonia/Nitrite: 0 ppm
Nitrate: <10 ppm ideally
High water quality is a must. Strong filtration, regular water changes, and a mature system help mimic the Scribbled Angelfish’s natural conditions.
Tank Requirements
Minimum Tank Size: 180 gallons (680 liters)
This species needs open swimming space and rockwork for grazing and hiding. An established tank with natural live rock is ideal.Decor:
Include caves, crevices, and shaded areas to make the fish feel secure. They are diurnal and will retreat at night.
Ease of Care
Difficulty Level: Moderate to Difficult
Due to their dietary needs and occasional territorial behavior, they are best suited for experienced aquarists. Their health is directly linked to proper nutrition and stable water parameters.
Species Variations
While Chaetodontoplus duboulayi does not have formally recognized subspecies, it exhibits slight regional color differences. Males especially may display:
More intense electric blue hues
Longer tail streamers
More vivid yellow scribbles on the body
The Albino Version
Albino Scribbled Angelfish are exceedingly rare and are not commonly seen in the hobby. Albino traits would include:
A pale yellow-white base color
Lack of pigment in the eyes (often red or pink)
Muted scribble pattern
Due to their rarity, albino individuals would likely fetch high prices and require even more careful care, especially regarding light sensitivity and stress reduction.
Relatives in the Genus Chaetodontoplus
The Scribbled Angelfish belongs to the Pomacanthidae family, which includes other large and striking angelfish species. Notable relatives include:
Blueface Angelfish (Chaetodontoplus septentrionalis)
Vibrant with a characteristic blue facial mask and yellow finsBlueline Angelfish (Chaetodontoplus septentrionalis)
Elegant blue lines across a dark body—less common in home aquariumsMeredith’s Angelfish (Chaetodontoplus meridithi)
Native to Australia, more aggressive and less reef-safe
Each relative shares similar body structures and care needs but varies in color, aggression, and reef compatibility.
Final Thoughts
The Scribbled Angelfish (Chaetodontoplus duboulayi) is an exquisite choice for large, well-maintained saltwater aquariums. While not the easiest fish to care for, its unique pattern and bold personality make it a standout centerpiece species for serious marine hobbyists.
If you’re considering adding one to your tank, ensure you provide a spacious setup, a varied sponge-rich diet, and carefully chosen tank mates. With proper care, this angelfish can thrive and become a living piece of art in your underwater world.
