Redfin Butterflyfish
Chaetodon lunulatus
The Redfin Butterflyfish (Chaetodon lunulatus) is a reef-dwelling butterflyfish of the tropical Indo-Pacific, closely tied to coral-rich lagoons and outer reef slopes. It is not a target angling species and is best appreciated as an aquarium/research fish rather than a game fish.
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Identification points
- Bright yellow body with a bold black eye stripe and a dark-edged white facial band
- Distinct red to orange patch on the posterior dorsal area and caudal peduncle
- Oval butterflyfish shape with a long snout and yellow tail fin
Habitat
Shallow coral reefs, lagoon patch reefs, and seaward reef slopes with abundant live coral, usually in clear tropical saltwater from the surface to about 20 m.
Bait notes
Not a practical angling species; it is rarely targeted with fishing gear. If encountered accidentally, tiny marine planktonic foods, coral-associated invertebrate imitations, or very small bits of shrimp may attract it in aquarium settings, but capture is generally discouraged.
Behavior
Usually seen in pairs or small groups, pecking at coral polyps, small invertebrates, and benthic morsels. It is diurnal, reef-associated, and often remains close to branching and massive corals for cover and feeding.
Caution
Reef fish that may be subject to local collection or export regulations; avoid capture in protected reef areas. Do not consume unless local guidance is clear, as small reef fishes can carry ciguatera risk in some locations.
Fishing notes
No meaningful sport-fishing methods apply. Avoid targeting reef butterflyfishes; if hooked incidentally on ultra-light reef tackle, release immediately with minimal handling and keep it in the water as much as possible.