Raccoon Butterflyfish care guide
Raccoon Butterflyfish (Chaetodon lunula) — minimum tank 300 L, temperature 24-27 °C, pH 8.1-8.4.
Compiled by Aquairi from published sources · Published · Updated
Overview
The Raccoon Butterflyfish (Chaetodon lunula) is a moderately large butterflyfish reaching about 20 cm. The body is golden-yellow with diagonal dark stripes on the flanks and a black mask through the eye edged in white — the pattern that gives the species its common name.
Taxonomy
- Family: Chaetodontidae
- Genus: Chaetodon
- Scientific name: Chaetodon lunula
Habitat
Widely distributed in the Indo-Pacific from the Red Sea and East Africa to Hawaii and the Marquesas, and from southern Japan to Lord Howe Island. The species inhabits coral reefs, rubble zones and reef flats from 1 to 30 m depth, often roaming in pairs.
Tank requirements
- Minimum tank volume: 300 L (79.3 US gal)
- Adult size: 15-20 cm
- Temperature: 24-27 °C (75-81 °F)
- pH: 8.1-8.4
- GH: 8-12 °dGH
- Water flow: moderate
- Lifespan: 5-10 years
- Salinity: SG 1.024-1.026
- Carbonate hardness (dKH): 8-12
Diet
A diurnal omnivore that picks at coral polyps, small invertebrates and filamentous algae in the wild and also feeds heavily on glass anemones (Aiptasia). In aquaria it usually accepts a varied frozen diet (mysis, enriched brine shrimp, mussel, krill) but is less of a specialist than many congeners.
Compatibility
Generally peaceful; pairs or single specimens are best, as conspecifics fight outside bonded pairs. Compatible with peaceful marine community fish — tangs, smaller angels, wrasses and cardinals — given an established tank with abundant cover.
Reef compatibility
Not reef-safe. The species samples coral polyps, soft coral colonies, feather-duster worms and clam mantles in addition to its useful taste for Aiptasia. Suitable only for FOWLR or invertebrate-tolerant systems.
Breeding
A pelagic broadcast spawner that forms temporary monogamous pairs. Captive breeding has not been achieved at a commercial scale and aquarium-trade specimens are wild-caught.
Conservation status
IUCN Red List: Least Concern. The species is one of the most widespread butterflyfishes in the Indo-Pacific.
Raccoon Butterflyfish (Chaetodon lunula) Breeding Guide
Overview
Chaetodon lunula is a butterflyfish (family Chaetodontidae) widespread across the tropical Indo-Pacific from East Africa to the Hawaiian and Marquesan islands, reaching about 20 cm (Wikipedia, FishBase). It is oviparous and shows distinct pairing with monogamous mating during breeding (FishBase). Butterflyfish in general are pelagic spawners whose buoyant eggs and larvae drift in the plankton, so this species is not bred in home aquariums.
Sexing
External sexual dimorphism is not documented in the consulted sources; the species forms monogamous pairs during breeding, but reliable visual sexing is not described.
Spawning Behavior & Trigger
Butterflyfish are pelagic spawners: paired fish release many buoyant eggs into the water, which become part of the plankton and float with the currents until hatching (Wikipedia). Chaetodon lunula forms distinct breeding pairs (FishBase). This open-water release of eggs cannot be reproduced or captured in an aquarium.
Egg & Fry Care
The larvae pass through the distinctive tholichthys stage characteristic of butterflyfish, in which the post-larval body is covered in large bony plates that are lost as the fish matures (Wikipedia). This long planktonic larval phase, with minute first-stage larvae drifting in open water, places butterflyfish among the most challenging marine fish to rear, and no home protocol exists for this species.
Common Challenges
The combination of broadcast pelagic eggs, a prolonged drifting larval period, and the tholichthys stage means that breeding Chaetodon lunula is beyond home aquaria. Keeping a healthy bonded pair is feasible, but reproduction to settlement is not.