Japanese Pygmy Angel Care Guide
Centropyge interrupta is a cool-water western Pacific dwarf angelfish with an orange body and blue spots, native to southern Japan.
Compiled by Aquairi from published sources · Published · Updated
Overview
Centropyge interrupta, the Japanese angelfish, is a dwarf angel of the family Pomacanthidae described by Tanaka in 1918. It has an orangey-yellow body with purplish-blue spots and a bright yellow tail; juveniles show a blue-margined black ocellus on the rear dorsal fin. It reaches about 15 cm total length.
Taxonomy
- Family: Pomacanthidae
- Genus: Centropyge
- Scientific name: Centropyge interrupta
Habitat
Found in the western Pacific around southern Japan, the Izu and Ogasawara Islands, and US waters at Midway, Kure and Pearl and Hermes Atolls. It lives on rocky reefs rich in coral and algae at depths of about 15-60 m and prefers cooler water than most dwarf angels.
Tank requirements
- Minimum tank volume: 300 L
- Temperature: 24-26 °C
- pH: 8.1-8.4
- Specific gravity: 1.024-1.026
- dKH: 8-12
- Adult size: 12-15 cm
- Lifespan: 8-15 years
Diet
Feeds on algae, benthic invertebrates and sponges. In aquaria it needs a mature tank with microalgae plus varied small foods including mysis and prepared angelfish diets.
Reef compatibility
Reef compatibility is variable; it may nip coral polyps and sessile invertebrates. Note its preference for cooler water; maintain specific gravity 1.024-1.026 and dKH 8-12.
Compatibility
Semi-aggressive, especially toward other dwarf angels; avoid keeping multiple Centropyge in one tank and avoid aggressive damsels. Suitable tankmates include tangs, clownfish, wrasses and gobies.
Breeding
It is oviparous and monogamous, usually encountered in pairs. Females change to males at about 12.7 cm; the transition takes 20-39 days. It has been bred and reared in captivity.
Conservation status
IUCN Red List: Least Concern. It is uncommon in the aquarium trade and can command high prices.
Centropyge interrupta (Japanese Pygmy Angel) Breeding Guide
Overview
Centropyge interrupta occurs in the subtropical western Pacific around southern Japan, the Izu and Ogasawara Islands, and the northwestern Hawaiian atolls of Midway, Kure and Pearl and Hermes. It reaches about 15 cm and lives at depths between roughly 15 and 60 m. It is one of the very few dwarf angels documented as successfully bred and reared in captivity, though it remains uncommon in the trade.
Sexing
The species is protogynous: females can change sex to male, with sources reporting the transition at around 12.7 cm body length over roughly 20 to 39 days. Functional sex is governed by social structure, and there is no dependable colour-based method to sex younger fish.
Spawning Behavior & Trigger
Unusually for the genus, Centropyge interrupta is typically encountered as monogamous pairs on rocky reefs rather than large harems. As in other dwarf angels, courtship builds through the late afternoon and culminates at dusk, when the female ascends into the water column and releases buoyant pelagic eggs while paired with the male.
Egg & Fry Care
The eggs are small, transparent and pelagic, drifting near the surface on an oil globule. Newly hatched larvae are tiny and planktonic; after the yolk reserve is used up in a few days they need extremely small first foods such as copepod nauplii. Successful captive rearing has been accomplished only with this kind of specialised larval support.
Common Challenges
- Eggs are broadcast into open water and disperse before they can be collected in a display.
- Larvae are too small for rotifers and depend on live copepod nauplii.
- The species favours cooler subtropical conditions, adding to husbandry complexity.
- Reported rearing success has come from dedicated culture, not standard home setups.