Heniochus chrysostomus
12cm
2-60m
72 sites
Chaetodontidae
Imagine gliding along a vibrant coral reef when a flash of yellow and white catches your eye – it's likely a Pennant Bannerfish (Heniochus chrysostomus)! These striking fish are a delightful sight for any diver or snorkeler. Reaching up to 18cm, they add a splash of elegance to the underwater landscape. You'll typically find them in pairs or small groups gracefully navigating the reef, often near branching corals where they seek shelter and food. Their distinctive pennant-like dorsal fin trailing behind them makes them instantly recognizable, and their generally peaceful nature allows for wonderful observation opportunities. These beauties are most commonly spotted in the South Pacific, Southeast Asia, around the Great Barrier Reef, and even near Japan and Korea. Keep an eye out for them in depths ranging from 2 to 60 meters, though they're more frequently encountered in shallower waters. While they don't actively seek out human interaction, they are generally unperturbed by the presence of divers, allowing you to admire their beauty up close. Their diet consists of small invertebrates, making them an important part of the reef ecosystem.
The Pennant Bannerfish is easily identified by its bright yellow body with two broad, vertical white bands. A long, trailing, white dorsal fin extension resembling a pennant is its most defining feature. They have a distinct black spot on their anal fin and a pointed snout which they use to probe for food in crevices. The yellow coloration is most intense on the fins and face, providing a vibrant contrast against the white bands.
