Saltwater Fish
Chaetodon capistratus
Chaetodon capistratus
(Four-Eyed Butterflyfish)

Species Description…

Scientific Name: Chaetodon capistratus
Common Name: Four-Eyed Butterflyfish
Species Group: Butterflyfish
Habitat: Fish Only
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Omnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 6 (inches)
Min Aquarium Size: 75 (gallons)
Native Range: Western Atlantic Ocean, including the Caribbean and Gulf of Mexico
Chaetodon Capistratus - The Four-Eyed Butterflyfish

Chaetodon Capistratus (The Four-Eyed Butterflyfish)

Overview

  • Native to the Western Atlantic, commonly found in coral reefs, seagrass beds, and shallow coastal waters.
  • Easily identified by its silvery-gray body with a black vertical stripe through the eye and a large false eyespot near the tail.
  • A relatively hardy species that adapts well to captivity when provided with optimal care.
  • Often found in pairs in the wild, particularly during the breeding season.
  • Best suited for a well-maintained marine aquarium with plenty of live rock and swimming space.

Feeding

  • Omnivorous, feeding on small invertebrates, coral polyps, and algae in the wild.
  • In captivity, it requires a diverse diet including sponge-based foods, frozen mysis shrimp, and marine algae.
  • May take time to adjust to prepared foods, so offering live or frozen food initially can help with acclimation.
  • Frequent small meals throughout the day help mimic its natural feeding habits.
  • A varied diet promotes overall health, immune function, and vibrant coloration.

Habitat

  • Commonly found in shallow coral reef environments with plenty of rock formations for shelter.
  • Prefers stable water conditions with moderate to low currents.
  • Aquarium setups should include live rock to encourage natural foraging behavior.
  • Thrives in clean, well-oxygenated water, requiring high-quality filtration.
  • Providing natural hiding spaces helps reduce stress and encourages natural behaviors.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) to support overall health.
  • Recommended pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires stable water conditions with regular maintenance and water changes.
  • Not considered fully reef-safe, as it may nip at corals and small invertebrates.
  • Providing an enriched environment with plenty of live rock structures supports its natural feeding instincts.

Compatibility

  • Generally peaceful but may show territorial behavior towards other butterflyfish.
  • Compatible with tangs, wrasses, and other non-aggressive marine fish.
  • Not completely reef-safe, as it has a tendency to graze on soft corals and sessile invertebrates.
  • Should not be housed with aggressive tankmates that may stress or outcompete it for food.
  • Providing adequate swimming space and rock formations reduces potential territorial disputes.

Aquarium Behavior

  • An active and curious species that enjoys exploring its surroundings.
  • Frequently seen picking at rock formations and searching for food.
  • May take time to acclimate but will become more confident as it adjusts.
  • Providing live rock encourages natural grazing behaviors and enhances comfort in the tank.
  • Over time, it may recognize its caretaker and respond actively during feeding sessions.