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Threadfin Butterflyfish (Chaetodon auriga)

Find Threadfin Butterflyfish across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Threadfin Butterflyfish
Photo: Holger Krisp · CC BY 3.0
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Where to buy Threadfin Butterflyfish

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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    Search Amazon
  • Petco

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    Search Petco

About Threadfin Butterflyfish

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.

Key facts

Min tank size
75 gallons
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.
Temperament
Peaceful
Reef safety
Reef Safe with Caution
Care Level
Moderate
Family
Chaetodontidae
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Feeding Schedule
2-3 times daily
Care Requirements
• Minimum 75 gallon tank • Maintain temperature 72–78°F • Keep salinity 1.023–1.025 SG • Requires well-established reef with stable conditions and hiding places among corals • Feed varied omnivorous diet 2–3 times daily; may be reluctant to accept food initially • Generally peaceful but may nip at small crustaceans and some soft corals; observe behavior closely
Difficulty Level
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.
Diet Details
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.
Max Size
9

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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