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Bicolor Angelfish

Centropyge bicolor

AnimaliaChordataActinopterygiiPerciformesPomacanthidae

📍 Indo-Pacific

Ask Finn

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.

Size6"
Min Tank55g
semi-aggressive
Zonemid

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.

Common Diseases

Ich (Marine Velvet)

Symptoms

White spots on body and fins, rapid breathing, lethargy, rubbing against rocks

Treatment

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)

Symptoms

Pitting or erosion of head and lateral line, loss of appetite

Treatment

Improve water quality, increase feeding frequency with varied foods including live algae, vitamin-enriched foods, and ensure adequate iodine supplementation

Bacterial Infection

Symptoms

Torn fins, open sores, cloudy eyes, behavioral changes

Treatment

Quarantine and treat with broad-spectrum antibiotics; maintain pristine water conditions with frequent partial water changes

Nutritional Deficiency

Symptoms

Fading color, lethargy, refusal to eat, stunted growth

Treatment

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

Stats

Community tips0
Kept by0 hobbyists