Black & White Heniochus

Black & White Heniochus (Heniochus acuminatus): Also known as the Longfin Bannerfish or Pennant Butterflyfish Distinct black‑and‑white banding with a long trailing dorsal filament Often mistaken for the reef‑safe Heniochus diphreutes, but acuminatus is a true butterflyfish Grows to about 8–9 inches and becomes a bold, active swimmer Origin & Habitat Found throughout the Indo‑Pacific: Maldives, Sri Lanka, Indonesia, Fiji, Great Barrier Reef Inhabits coral reefs, lagoons, and outer reef slopes Frequently seen in pairs or small groups in the wild Temperament & Reef Safety Peaceful and social; Schooling, does well in groups Not reef‑safe — may nip at corals, polyps, and some invertebrates Excellent for FOWLR systems or large community tanks Tank Requirements Minimum 125 gallons due to adult size and active swimming behavior Requires open swimming space and rockwork for shelter Stable water parameters: 72–78°F, pH 8.1–8.4, salinity 1.020–1.025, dKH 8–12 Diet Omnivore Eats mysis shrimp, brine shrimp, chopped seafood, marine algae, and high‑quality omnivore pellets Benefits from multiple small feedings daily Compatibility Peaceful with most fish Can be kept singly, in pairs, or in small groups Avoid aggressive tankmates that may damage the long dorsal streamer Why Hobbyists Love It Striking black‑and‑white coloration with dramatic pennant fin Active, graceful swimmer that adds movement and contrast Ideal centerpiece fish for large FOWLR displays