We ship worldwide

Chaetodon Melapterus

The Chaetodon melapterus, commonly known as the Arabian Butterflyfish or Blackfin Butterflyfish, is a beautiful but challenging species to keep in a home aquarium.

Category:

Description

Aquarium Requirements:

  • Tank Size: 120+ gallons (450+ liters) due to its active swimming behavior.
  • Water Parameters:
    • Temperature: 74–82°F (23–28°C)
    • pH: 8.1–8.4
    • Salinity: 1.020–1.025
    • Water Flow: Moderate

Size & Lifespan:

  • Adult Size: Up to 9 inches (23 cm)
  • Lifespan: 5–10 years with proper care

Behavior & Tank Mates:

  • Semi-aggressive—may be territorial, especially toward other butterflyfish.
  • Best kept alone or in pairs, but can cohabitate with peaceful tankmates like tangs and larger wrasses.
  • Not reef-safe—will eat corals, polyps, and invertebrates.

Diet & Feeding:

  • Omnivorous, with a diet that includes:
    • Sponges & coral polyps (difficult to replace in captivity)
    • Mysis shrimp, brine shrimp, krill
    • High-quality frozen and pellet foods
    • Marine algae & seaweed
  • Feed at least 2–3 times daily to maintain health.

Additional Care Tips:

  • Difficult to keep—often requires live coral for proper nutrition.
  • Needs plenty of hiding spots and live rock for grazing.
  • Prone to stress and disease—ensure high water quality and quarantine before introducing to a display tank.

This species is best suited for advanced aquarists due to its feeding challenges.