Common name: Longfin bannerfish

General information

The Pennant Coral Fish, also known as the Longfin Bannerfish or Heniochus acuminatus, is a striking marine fish that is popular among aquarists for its elegant appearance. It is characterized by its white body with two broad black vertical bands and a long, white, pennant-like dorsal fin. This species is often confused with the Moorish Idol, but can be distinguished by its longer snout and the shape of its dorsal fin.

Care

Heniochus acuminatus requires a large aquarium with plenty of swimming space and stable water conditions. They are generally peaceful but can be territorial with their own kind, so it's best to keep them singly or in a mated pair. They thrive on a varied diet of meaty foods, algae, and marine flakes or pellets. Care should be taken to ensure a well-rounded diet to prevent nutritional deficiencies.

Reproduction

In the wild, Longfin Bannerfish form monogamous pairs during the breeding season. They are pelagic spawners, releasing eggs and sperm into the water column where fertilization occurs. The larvae are planktonic, drifting in the currents until they develop into juveniles. Breeding them in captivity is challenging and not commonly done by hobbyists.

Habitat

Heniochus acuminatus is found in coral reefs and lagoons in the Indo-Pacific region. They prefer areas with strong water movement and are often observed in pairs or small groups. In the wild, they can be found at depths ranging from shallow waters to about 75 meters.

Geographical distribution includes the Red Sea and East Africa to the Hawaiian, Marquesan, and Ducie islands, north to southern Japan, south to Lord Howe and Rapa islands, and throughout Micronesia.