Species Description…

Scientific Name: Chaetodon octofasciatus

Common Name: Eightband Butterflyfish

Species Group: Butterflyfish

Habitat: Fish Only

Care Level: Advanced

Temperament: Peaceful

Diet Type: Carnivore

Role in Aquarium: Showpiece Fish

Max Fish Length: 5 (inches)

Min Aquarium Size: 75 (gallons)

Native Range: Indo-Pacific, from the Indian Ocean to the western Pacific

Chaetodon Octofasciatus - The Eightband Butterflyfish

Chaetodon Octofasciatus (The Eightband Butterflyfish)

Native to the Indo-Pacific, commonly found in coral reefs, lagoons, and rocky reef environments.
Distinguished by its bright yellow body adorned with eight bold black vertical bands.
A specialized species with a diet that primarily consists of coral polyps.
Often found in pairs or small groups, particularly in areas with dense coral formations.
Best suited for experienced aquarists due to its feeding habits and sensitivity to water conditions.

Obligate corallivore, feeding almost exclusively on live coral polyps in the wild.
Requires a diet of sponge-based foods, frozen mysis shrimp, and high-quality marine algae in captivity.
May take time to transition to prepared foods, making feeding a challenge for new keepers.
Frequent small meals throughout the day help sustain energy levels and digestive health.
A well-balanced diet supports strong immunity and prevents nutritional deficiencies.

Prefers coral-rich reef environments with moderate water movement.
Commonly found near reef slopes and sheltered areas with abundant food sources.
Aquarium setups should include live rock to encourage natural foraging behaviors.
Requires excellent water quality with high filtration efficiency to prevent stress-related illnesses.
Providing both shaded areas and open swimming space helps the fish feel secure and comfortable.

Optimal water temperature: 75-82°F (24-28°C) for maintaining metabolic balance.
Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
Requires stable water parameters with frequent water changes to ensure long-term health.
Not reef-safe due to its coral-feeding nature, making it unsuitable for reef aquariums.
Providing live rock formations enhances its natural grazing behavior and reduces stress.

Generally peaceful but may become territorial towards other butterflyfish in confined spaces.
Compatible with tangs, wrasses, and other non-aggressive marine fish.
Not suitable for reef tanks, as it will actively graze on coral polyps.
Should be housed with similarly sized fish that do not pose a threat or compete for food.
Providing ample swimming space and structured environments helps maintain a peaceful community.

An active and agile swimmer that explores its environment constantly.
Frequently observed picking at rock surfaces in search of food.
May take time to acclimate to a new environment but becomes more comfortable over time.
Providing live rock supports natural foraging behaviors and encourages activity.
Over time, it may develop recognition of its caretaker and exhibit interactive behaviors during feeding sessions.