Pygmy Cherub Angelfish care guide
Pygmy Cherub Angelfish (Centropyge argi) — minimum tank 100 L, temperature 24-27 °C, pH 8.1-8.4.
Compiled by Aquairi from published sources · Published · Updated
Overview
The Cherub or Pygmy Angelfish (Centropyge argi) is the smallest dwarf angel commonly kept in aquaria, reaching only about 7 cm. The body is a uniform deep navy blue with a contrasting orange-yellow face and blue lips, and a fine blue trim along the fins.
Taxonomy
- Family: Pomacanthidae
- Genus: Centropyge
- Scientific name: Centropyge argi
- Common synonyms: Cherub Angelfish, Atlantic Pygmy Angel
Habitat
Endemic to the tropical Western Atlantic from Bermuda and the Bahamas through the Caribbean and northern Gulf of Mexico to French Guiana. It occurs on rubble fields, coral patches and deeper rocky outcrops, typically from 5 to 100 m depth.
Tank requirements
- Minimum tank volume: 100 L (26.4 US gal)
- Adult size: 5-7 cm
- Temperature: 24-27 °C (75-81 °F)
- pH: 8.1-8.4
- GH: 8-12 °dGH
- Water flow: moderate
- Lifespan: 5-8 years
- Salinity: SG 1.024-1.026
- Carbonate hardness (dKH): 8-12
Diet
An omnivore that grazes on filamentous algae, detritus and microfauna. In aquaria it accepts marine pellets, mysis, enriched brine shrimp and dried algae sheets; a varied diet with vegetable content maintains body colour.
Compatibility
One of the more peaceful Centropyge but still intra-genus territorial; only one per tank. Compatible with peaceful reef community fish — clownfish, gobies, blennies, smaller wrasses and cardinals. The small adult size makes it suitable for nano reef systems from about 100 L.
Reef compatibility
Reef-safe with caution. Most specimens leave hard corals alone, but individuals may sample large-polyp stony coral polyps, zoanthids or clam mantles. The species is one of the more reliable Centropyge in mixed reefs.
Breeding
A pelagic broadcast spawner. Centropyge argi has been successfully captive-bred in research aquaculture programs and tank-raised juveniles are occasionally available in the marine ornamental trade.
Conservation status
IUCN Red List: Least Concern. The species is widely distributed across the Western Atlantic and the global population is not considered to be at risk.
Pygmy Cherub Angelfish Breeding Guide
Overview
The pygmy cherub angelfish (Centropyge argi), also called the cherubfish or Atlantic pygmy angel, is a small pomacanthid of the western Atlantic from Bermuda and North Carolina through the Caribbean and Gulf of Mexico to French Guiana. It occurs over coral rubble at depths of about 5-18 m, reaching only 8 cm, and feeds on algae and small benthic invertebrates. Home breeding is not established; the following describes wild biology and the genus's reproductive mode.
Sexing
The species lives in small groups of around ten fish, usually a single male with a few females and juveniles. As a Centropyge dwarf angelfish it is a protogynous hermaphrodite, so a dominant individual develops as the male and the highest-ranking female can change sex if the male is lost.
Conditioning
No home conditioning protocol is documented. Its small harem structure means a single male should be kept with several females rather than with rival males.
Spawning Behaviour & Trigger
Centropyge dwarf angelfish are pelagic spawners. As documented for the closely related bicolor angelfish, the male visits females at dusk and the female releases eggs into open water for the male to fertilise; this dusk pelagic pattern is typical of the genus.
Egg & Fry Care
Reproduction is pelagic, with eggs and larvae developing in open water and no parental care. The planktonic larvae cannot be practically reared in a home aquarium.
Common Challenges
Although specialist facilities have captive-bred related Centropyge such as the coral beauty using cultured rotifers and copepods, that infrastructure is not reproducible at home. Pelagic spawning and tiny first-feeding larvae keep hobbyist reproduction out of reach.