Threadfin Butterflyfish (Chaetodon auriga)

Fish in the family Chaetodontidae. Moderate care. Reef Safe with Caution.

Threadfin Butterflyfish

Quick facts

Scientific nameChaetodon auriga
FamilyChaetodontidae
Care levelModerate
Reef safetyReef Safe with Caution
TemperamentPeaceful
Dietomnivore
Adult size9 in
Minimum tank size75 gallons
Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Feeding schedule2-3 times daily

Appearance

The Threadfin Butterflyfish is a deep-bodied fish with predominantly yellow coloration on the head and body, accented with black and white diagonal stripes. A distinctive black eye-band runs vertically through the eye, and elongated dorsal fin rays extend beyond the body like threads, giving the species its common name.

Diet and feeding

Feed a varied omnivorous diet including mysis shrimp, copepods, small crustaceans, and quality prepared foods. In captivity, offer a mix of frozen and dried foods supplemented with occasional vegetable matter to mimic their natural grazing behavior.

Difficulty and care for the Threadfin Butterflyfish

Moderate difficulty. The Threadfin Butterflyfish is hardier than many butterflies but can be sensitive to poor water quality and sudden environmental changes. Requires a well-established reef with stable parameters.

Common health issues

Ich, marine velvet, parasitic infections, fin damage from aggression, poor appetite in new tanks

Origin and habitat

Indo-Pacific region from the Red Sea and East Africa through the Indian Ocean to the central Pacific, including Hawaii and the Great Barrier Reef.

Log Threadfin 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 Threadfin Butterflyfish alongside everything else in your reef.