Saltwater Fish
Chaetodon falcula
Chaetodon falcula - Saddleback Butterflyfish

Chaetodon falcula (Saddleback Butterflyfish)

Species Description…

Scientific Name: Chaetodon falcula
Common Name: Saddleback Butterflyfish
Species Group: Butterflyfish
Habitat: Fish Only
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Omnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 8 (inches)
Min Aquarium Size: 125 (gallons)
Native Range: Indian Ocean, from East Africa to Indonesia

Overview

  • Native to the Indian Ocean and the western Pacific, commonly found in coral-rich reefs and lagoons.
  • Distinguished by its white body with two bold black saddle-like markings and a yellow dorsal fin.
  • A relatively large and active butterflyfish species that requires ample swimming space.
  • Often found in pairs or small groups in the wild, displaying social and interactive behaviors.
  • Best suited for an established marine aquarium with plenty of rock formations and hiding spots.

Feeding

  • Omnivorous, primarily feeding on coral polyps, small invertebrates, and algae in the wild.
  • Requires a diet of sponge-based foods, frozen mysis shrimp, high-quality pellets, and marine algae in captivity.
  • Can be slow to accept prepared foods, so a varied diet should be offered to ensure proper nutrition.
  • Multiple small feedings per day support digestion and prevent malnutrition.
  • A well-balanced diet enhances coloration, immune function, and overall vitality.

Habitat

  • Prefers coral reef environments with abundant shelter and grazing areas.
  • Thrives in stable water conditions with moderate to strong water flow.
  • Aquarium setups should include live rock for natural foraging and refuge.
  • Maintaining excellent water quality is crucial, as this species is sensitive to poor conditions.
  • Providing both shaded areas and open swimming spaces encourages natural behaviors.

Fish Care

  • Optimal water temperature: 74-82°F (23-28°C) to support metabolic function.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires high-quality filtration and frequent water changes to maintain stable parameters.
  • Not reef-safe, as it tends to nip at corals and sessile invertebrates.
  • Providing live rock formations and structured tank decor supports its natural behaviors.

Compatibility

  • Generally peaceful but may exhibit aggression toward other butterflyfish in smaller aquariums.
  • Compatible with tangs, angelfish, and other semi-aggressive marine species.
  • Not recommended for reef tanks due to its tendency to graze on coral polyps.
  • Should be housed with fish of similar size and temperament to prevent bullying or competition.
  • Providing ample space and structured territories minimizes potential conflicts.

Aquarium Behavior

  • An active species that enjoys swimming throughout the aquarium.
  • Frequently observed picking at rock formations and interacting with its surroundings.
  • May take time to acclimate but becomes more confident once settled.
  • Providing live rock enhances foraging opportunities and encourages natural behaviors.
  • Over time, it may recognize its caretaker and display interactive behavior, especially during feeding times.