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Bicolor Angelfish
Centropyge bicolor
Animalia›Chordata›Actinopterygii›Perciformes›Pomacanthidae
📍 Indo-Pacific
Bold two-toned dwarf angelfish — vivid yellow anterior half and deep blue posterior half with a yellow caudal fin. Visually striking but notoriously difficult; often refuses dry foods and declines in captivity without live algae.
Care Guide
Diet
Bicolor Angelfish are omnivores requiring a varied diet heavy in vegetable matter and live foods. Offer high-quality marine flakes, small pellets, frozen mysis shrimp, and live brine shrimp once daily. Supplement heavily with live macroalgae (Caulerpa, Chaetomorpha) or dried nori sheets, as they graze constantly in the wild and often refuse prepared foods without abundant algae.
Behavior
These dwarf angels are bold and curious but can become territorial and aggressive toward similar-sized fish, especially other angelfish. They spend most of their time mid-water grazing on algae and picking at rockwork. They are active swimmers that require plenty of hiding spaces and established territories to reduce stress and aggression.
Breeding
Breeding in captivity is extremely rare and difficult; virtually no successful captive breeding records exist for this species. They are pelagic spawners requiring massive tank volumes and precise environmental conditions unlikely to be replicated in home aquaria. Virtually all specimens in the hobby are wild-caught, making them challenging to acclimate.
Tank Mates
Similar size and reef-safe; may compete for food but generally peaceful coexistence
Stays in lower water column; minimal competition and non-aggressive
Small, peaceful, and occupies different feeding niche
Provides beneficial cleaning service; angelfish typically ignore shrimp
Colorful and reef-safe; may be nipped at but generally tolerated
Common Diseases
Ich (Marine Velvet)
White spots on body and fins, rapid breathing, lethargy, rubbing against rocks
Quarantine immediately; raise temperature to 28-29°C, use copper-based medication or hyposalinity treatment (SG 1.009-1.012) for 3-4 weeks
Head and Lateral Line Erosion (HLLE)
Pitting or erosion of head and lateral line, loss of appetite
Improve water quality, increase feeding frequency with varied foods including live algae, vitamin-enriched foods, and ensure adequate iodine supplementation
Bacterial Infection
Torn fins, open sores, cloudy eyes, behavioral changes
Quarantine and treat with broad-spectrum antibiotics; maintain pristine water conditions with frequent partial water changes
Nutritional Deficiency
Fading color, lethargy, refusal to eat, stunted growth
Provide varied diet with live macroalgae, quality flakes, frozen foods, and vitamin supplements; ensure adequate feeding frequency
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Quick Facts
- pH
- 8.1–8.4
- diet
- omnivore/algae/live food
- maxSize
- 6 inches
- salinity
- SG 1.020–1.025
- minTankSize
- 55 gallons
- temperature
- 75–82°F (24–28°C)
Temperature
75–82°F
24–28°C