This angelfish is common on the Great Barrier Reef, where it is mostly found alone or in pairs.
  • Size

    6 inches (15 cm)
  • Diet

    Algae and small bottom-dwelling animals such as tunicates, coral polyps and worms
  • Range

    Western Pacific Ocean
  • Habitat

    Coral and rubble areas of seaward reefs and lagoons

Physical Characteristics

  • Coloration is blue and yellow. Named for the two colors it displays. Head and tail are bright yellow and the body is deep blue. Distinguishable by blue bar across its forehead extending to the eyes.
  • As with all angelfish, has a prominent spine on the lower rear edge of the cheek.
  • Maximum length of 6 inches (15 cm).

Animal Fact

The bicolor angelfish is an omnivore – it eats algae, as well as coral polyps and worms!

Diet / Feeding

  • Diet consists of algae and small bottom-dwelling animals such as tunicates, coral polyps and worms.

Range / Habitat

  • Occurs in the Western Pacific from Indonesia and the Philippines to New Guinea, Southwest Japan, and Northwest and Eastern Australia.
  • Found in coral and rubble areas of seaward reefs and lagoons in depths of 33-82 feet (10-25 m).

Reproduction & Growth

  • Most angelfish tend to form harems consisting of a single, larger male and 2-5 females.
  • Females form a hierarchical order of dominance within the harem. If the male dies, the dominant female can take his place as angelfish are capable of sex reversal from female to male.
  • Angelfish spawn in the evening right before dark within a period of 8-10 minutes. The female swims up from the reef into the water column followed by a larger male. Male presses his snout against the female’s abdomen. Due to this interaction, eggs and sperm are released into the surrounding water and are fertilized as the parents return back down to the reef bottom. The female sheds all of her eggs during one trip. However, the male repeats this spawning process numerous times, usually with each member of the harem.

Conservation Status

  • “Not Evaluated” on the IUCN Red List.

Additional Information

  • A common species, especially on the Great Barrier Reef.
  • Mainly a solitary fish, but sometimes lives in pairs or small groups.

Sources

  • Reef Fish. Thresher, R. E., pgs. 39, 43-44
  • Reef Fish Identification – Tropical Pacific. Allen, G.; Steene, R; Humann, P. and  Deloach, N.,
  • A Guide to Angelfishes & Butterflyfishes. Allen, G.; Steene, R. and Allen, M.
  • Butterflyfish & Angelfishes of the World.  Volume 1, Steene, R. C., pgs 95-96
  • www.fishbase.org
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