Where to buy Western Triangle Butterflyfish
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About Western Triangle Butterflyfish
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.
Key facts
- Reef safety
- Reef Safe with Caution
- Temperament
- Semi Aggressive
- Difficulty Level
- 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.
- Family
- Chaetodontidae
- Water Parameters
- Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
- 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.
- Feeding Schedule
- 2-3 times daily
- Care Requirements
- • Minimum 75-gallon tank; prefers 100+ gallons for long-term health • Water: 75-80°F, pH 8.1-8.3, sg 1.023-1.025, excellent water quality • Thriving corals, rich live rock, and sponge growth required; grazes heavily • Feed varied diet: high-quality flake, small pellets, frozen mysis, spirulina • Moderate water flow; compatible with peaceful reef community
- Common Health Issues
- Ich, marine velvet, loss of appetite, lateral line erosion
- Origin
- 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.
- Min tank size
- 75 gallons
- Max Size
- 7
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