Saltwater Fish
Swallowtail Angelfish

Species Description…

Scientific Name: Genicanthus melanospilos
Common Name: Swallowtail Angelfish
Species Group: Angelfish
Habitat: Reef Safe
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Omnivore
Role in Aquarium: Community Fish
Max Fish Length: 7 (inches)
Min Aquarium Size: 125 (gallons)
Native Range: Indo-Pacific
Genicanthus melanospilos - Swallowtail Angelfish

Genicanthus melanospilos (Swallowtail Angelfish)

Overview

  • Native to the Indo-Pacific, found in deep reef slopes and lagoons.
  • Recognized for its elegant silver body, dark fin markings, and forked tail.
  • Sexually dimorphic, with males having distinct black patterns on their dorsal and anal fins.
  • One of the few angelfish species that is completely reef-safe.
  • Often found in pairs or small groups, making it ideal for community aquariums.

Feeding

  • Primarily a zooplanktivore, feeding on small planktonic organisms in the wild.
  • Readily consumes a variety of prepared foods, including flakes, pellets, and frozen shrimp.
  • Requires a diverse diet with frequent small feedings throughout the day.
  • Can benefit from occasional supplementation with marine algae or spirulina-based foods.
  • Providing a high-protein diet ensures vibrant coloration and overall health.

Habitat

  • Typically inhabits deep reefs ranging from 50 to 200 feet in depth.
  • Requires an aquarium with ample swimming space and rock structures for security.
  • Thrives in reef tanks with moderate water movement and stable conditions.
  • Prefers a well-established system with high water quality and adequate oxygenation.
  • Ideal for large aquariums (minimum 100 gallons) to accommodate its active swimming nature.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C).
  • Ideal pH range: 8.1-8.4, with a specific gravity of 1.023-1.026.
  • Resilient when provided with a well-maintained environment.
  • Prone to stress if housed with aggressive tank mates or in cramped conditions.
  • Requires frequent water changes to maintain stable water quality.

Compatibility

  • One of the most peaceful angelfish species, suitable for community reef tanks.
  • Compatible with tangs, wrasses, gobies, and other non-aggressive species.
  • Can be kept singly, in pairs, or in small harems with a single dominant male.
  • Avoid housing with aggressive fish that may stress or outcompete it for food.
  • Does well in a mixed-reef environment with corals, invertebrates, and other peaceful fish.

Aquarium Behavior

  • Highly active swimmer, often seen patrolling the mid-to-upper water column.
  • Engages in social interactions with tank mates, especially in pairs or groups.
  • Curious and intelligent, adapting quickly to new environments.
  • Non-aggressive but may display dominance behavior towards conspecifics.
  • Thrives in an environment with stable water conditions and a varied diet.