Saltwater Fish
Pennant Bannerfish

Species Description…

Scientific Name: Heniochus chrysostomus
Common Name: Pennant Bannerfish
Species Group: Butterflyfish
Habitat: Reef Safe with Caution
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: Indo-Pacific
Heniochus chrysostomus - Pennant Bannerfish

Heniochus chrysostomus (Pennant Bannerfish)

Overview

  • Native to the Indo-Pacific, including the Red Sea, Indian Ocean, and Pacific reefs.
  • Easily identified by its black-and-white striped pattern with a golden-yellow snout.
  • Often mistaken for the Moorish idol due to its elongated dorsal fin resembling a pennant.
  • Commonly found in pairs or small groups in coral-rich lagoons and reef slopes.
  • Popular among aquarists for its striking appearance and social behavior.

Feeding

  • Omnivorous diet, feeding on plankton, small invertebrates, and coral polyps in the wild.
  • Accepts a variety of aquarium foods, including high-quality flakes, pellets, and frozen fare like mysis shrimp and brine shrimp.
  • Requires supplemental algae-based foods and spirulina to maintain optimal health.
  • Multiple daily feedings are recommended to support its high metabolism.
  • Foraging behavior includes picking at rock surfaces for small organisms.

Habitat

  • Typically inhabits reef slopes, outer reef areas, and shallow coral lagoons with moderate water flow.
  • Prefers an aquarium setup with open swimming space and live rock for shelter.
  • Requires stable water parameters and a well-established biological filtration system.
  • Best suited for large tanks (minimum 125 gallons) due to its active swimming nature.
  • Not always reef-safe, as it may nip at coral polyps and sessile invertebrates.

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.
  • Moderately hardy but requires pristine water conditions and regular maintenance.
  • Can be prone to stress when housed with aggressive tank mates.
  • Regular water changes and strong filtration help maintain long-term health.

Compatibility

  • Generally peaceful but may become territorial toward other butterflyfish.
  • Best suited for community aquariums with tangs, wrasses, and clownfish.
  • Should be housed in pairs or small groups if space permits.
  • Not recommended for fully reef-safe setups due to its tendency to nip at corals.
  • Should not be housed with aggressive fish that may intimidate or outcompete it.

Aquarium Behavior

  • Active and social swimmer, frequently seen exploring the mid-water column.
  • Forms bonds with tank mates and often interacts with conspecifics.
  • Can be shy initially but quickly adapts to well-maintained environments.
  • Engages in natural foraging, picking at rocks and substrates for small food particles.
  • Thrives in a stable, well-maintained aquarium with ample swimming space.