The Golden Butterflyfish (Chaetodon semilarvatus), also known as the Bluecheek Butterflyfish, is a striking marine species renowned for its vibrant coloration and distinctive markings. Native to the Red Sea and the Gulf of Aden, this species is a favorite among marine aquarists due to its beauty and relatively peaceful nature.
Key Information
• Small fish safe: Yes
• Small invert safe: No
• Coral safe: No
• Minimum tank size: 473 liters (125 gallons)
• Adult size: Up to 28 cm (11 inches)
• Diet: Omnivorous, primarily feeding on coral polyps, small invertebrates, and algae.
• Be aware of: May nip at corals and small invertebrates; requires a well-established tank with ample live rock for grazing and hiding; can exhibit territorial behavior, especially towards similar species.
Appearance and Coloration
The Golden Butterflyfish is characterized by its bright yellow body adorned with a series of closely spaced orange stripes running vertically along its sides. A notable dark blue-gray patch is present behind each eye, giving rise to the name “Bluecheek Butterflyfish.” Its dorsal, anal, and caudal fins share the same vibrant yellow hue as its body, contributing to its striking appearance.
Natural Habitat and Behavior
In the wild, Chaetodon semilarvatus is commonly found in areas with rich coral growth, often seen in pairs or small aggregations. They are occasionally observed hovering in a stationary position for extended periods under ledges of Acropora plate corals. During breeding, they form pairs.
Tank Requirements and Water Parameters
To ensure the well-being of the Golden Butterflyfish in captivity:
• Minimum Tank Size: A 125-gallon (473 liters) aquarium is recommended to provide ample space for swimming and territory establishment.
• Water Parameters:
• Temperature: 24°C – 26°C (75°F – 79°F)
• pH: 8.1 – 8.4
• Specific Gravity: 1.020 – 1.025
• Aquascaping: Incorporate abundant live rock to create hiding spots and grazing areas, mimicking their natural reef habitat.
• Lighting: Moderate to high lighting is suitable.
• Water Movement: Moderate flow to simulate their natural environment.
Maintaining stable water conditions and high water quality is crucial for their health. A mature, well-established aquarium with abundant live rock will support their natural grazing behavior and provide necessary shelter.
Diet and Feeding
Golden Butterflyfish are omnivorous, with a diet that includes both plant and animal matter:
• Diet: In the wild, they primarily feed on coral polyps, small invertebrates, and algae. In captivity, offer a varied diet consisting of:
• Marine algae and spirulina
• Mysis shrimp
• Brine shrimp
• High-quality angelfish preparations
• Feeding Frequency: Feed small amounts multiple times daily to meet their nutritional needs.
Providing ample live rock will allow natural grazing behavior, which is beneficial for their health and well-being. Initially, they may be shy and reluctant to eat; offering live or frozen foods can encourage feeding until they become accustomed to prepared foods.
Compatibility and Social Structure
Golden Butterflyfish can exhibit territorial behavior, especially towards conspecifics and similar species:
• Social Structure: Best kept singly unless in a very large aquarium where multiple individuals can establish territories.
• Temperament: Generally peaceful towards other species but may become aggressive towards similar-looking fish.
• Compatible Tank Mates: Suitable companions include peaceful community fish such as gobies, blennies, and wrasses. Caution is advised when housing with other butterflyfish or species with similar coloration.
Observing their interactions and providing ample space can help mitigate aggressive behaviors. Due to their territorial nature, they should be housed with non-aggressive tank mates to prevent stress.
Important Considerations
• Reef Compatibility: While often considered reef-safe, individual specimens may nip at corals and clam mantles. Monitoring their behavior is essential, especially in reef setups.
• Acclimation: They may be shy upon introduction but typically become more confident over time.
• Health: Ensure a varied diet and stable water conditions to prevent common health issues.
With proper care and attention to their specific needs, Golden Butterflyfish can be a vibrant and rewarding addition to a marine aquarium.