Western Triangle Butterflyfish (Chaetodon declivis)
Fish in the family Chaetodontidae. Moderate care. Reef Safe with Caution.
Quick facts
Appearance
A moderately-sized butterflyfish with a distinctive yellow body and black striping pattern. Chaetodon declivis displays a characteristic triangular or wedge-shaped dark marking on the anterior portion of the body, and a black eye-band. The dorsal and anal fins are accented with yellow and black banding.
Diet and feeding
Feed a varied diet of high-quality frozen and prepared foods including mysis shrimp, brine shrimp, and finely chopped seafood. Supplement with quality flake foods and sponge-based preparations. Butterflyfish are primarily carnivorous and benefit from frequent small meals.
Difficulty and care for the Western Triangle Butterflyfish
Moderate. Chaetodon declivis requires stable water conditions, a varied diet, and careful tank mates. While hardier than some butterflyfish species, they can be finicky feeders and need established reef systems with ample live rock.
Common health issues
Ich, marine velvet, loss of appetite, lateral line erosion
Origin and habitat
Eastern Indian Ocean and Western Pacific, ranging from Indonesia and the Great Barrier Reef southward to temperate Australian waters. This species is endemic to cooler reef systems in the southern Indo-Pacific region.
Log Western Triangle Butterflyfish in your reef tank
Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Western Triangle Butterflyfish alongside everything else in your reef.
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