Saltwater Fish
Chaetodon auriga

Species Description…

Scientific Name: Chaetodon auriga
Common Name: Threadfin Butterflyfish
Species Group: Butterflyfish
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Omnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 9 (inches)
Min Aquarium Size: 125 (gallons)
Native Range: Indo-Pacific, including the Red Sea, Indian Ocean, and the Great Barrier Reef
Chaetodon Auriga - The Threadfin Butterflyfish

Chaetodon Auriga (The Threadfin Butterflyfish)

Overview

  • Native to the Indo-Pacific, including the Red Sea and eastern coasts of Africa.
  • Easily recognized by its white body adorned with diagonal black stripes and a distinct black spot near the rear fin.
  • A hardy and adaptable species that thrives in well-maintained aquariums.
  • Generally peaceful but may display territorial behavior toward other butterflyfish.
  • Requires a spacious marine aquarium with rock structures and open swimming areas.

Feeding

  • Omnivorous, primarily consuming small crustaceans, coral polyps, and algae in the wild.
  • Readily accepts high-quality marine pellets, frozen foods, and meaty seafood-based diets in captivity.
  • Including sponge-based food in its diet enhances health and maintains bright coloration.
  • Regular feeding throughout the day supports digestion and sustains energy levels.
  • A well-balanced diet helps ensure a strong immune system and overall well-being.

Habitat

  • Prefers coral-rich environments with ample rock formations for shelter.
  • Thrives in moderate water movement with stable water parameters.
  • Aquarium setups should feature live rock for natural foraging and enrichment.
  • Requires a well-maintained marine system with clean, oxygenated water.
  • Providing shaded areas and swimming space helps encourage natural behaviors.

Fish Care

  • Ideal water temperature: 74-80°F (23-27°C) for optimal health.
  • Recommended pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires strong filtration and frequent water changes to maintain water clarity.
  • Acclimating it to a mature aquarium reduces stress and promotes a healthy adjustment.
  • Providing a structured environment with caves and crevices helps minimize territorial disputes.

Compatibility

  • Generally peaceful, but may become aggressive toward other butterflyfish.
  • Compatible with tangs, wrasses, and other similarly non-aggressive species.
  • Not considered reef-safe, as it may nibble on corals and small invertebrates.
  • Should not be housed with overly aggressive fish that could intimidate or outcompete it.
  • Providing ample swimming space reduces stress and territorial behavior.

Aquarium Behavior

  • An active and curious swimmer that explores rock formations frequently.
  • Often seen foraging for food along rock surfaces and investigating its surroundings.
  • May establish a territory but generally coexists well in larger tanks with diverse species.
  • Providing a dynamic environment with live rock encourages natural feeding behaviors.
  • Over time, it may become more interactive with its caretaker, especially during feeding times.

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