More
    Categories

    Koran Angelfish

    Related Articles

    The Koran Angelfish (Pomacanthus semicirculatus), also known as Blue Angelfish, Semicircle angelfish and Half-circled angelfish, is one of the most common and best known angelfishes.

    Appearance

    It is native to the Indo-Pacific coral reefs and can reach about 40 cm in length. The juveniles have wide and narrow semicircular bands. When juveniles are smaller than 2 cm long, they have only three stripes. As they grow, the intervals of the stripes get wider until the body reaches 4 cm. At that stage, new stripes emerge between the original stripes. New lines are thin at first, but gradually get broader. When the body reaches 8 – 9 cm, an identical process is repeated.

    As this angelfish matures, its blue background is replaced by golden brown with numerous blue specks on body and fins which are outlined in luminous blue. The pale markings on the caudal fin are regarded as being similar to the Arabic script used in the Koran, hence the unusual name of this species.

    Character

    This majestic and solitary species is friendly and easily approached. Juveniles feed on small crustaceans, while adults feed on algae, sponges, sea squirts and invertebrates. Adults prefer outer reef walls and are often seen on shipwrecks.

    Video Credits: Brock Leonard
    Image Credits: Gdiggers, WikiMedia

    References:

    1. David Alderton – Encyclopedia of Aquarium & Pond Fish
    2. Dennis King – Reef Fishes & Corals: East Coast of Southern Africa
    3. Clifford Henry Taubes – Modeling Differential Equations in Biology

    Categories

    Other Topics

    Kai Ken ( 甲斐犬/ Tora Inu/ Tiger Dog)

    Overview The Kai Dog, also known as Kai Tora-ken, originated from medium-sized dogs that existed in Japan since...

    Polish Greyhound (Chart Polski)

    History & Overview The Polish Greyhound is a large short-haired sighthound. It is believed to be related to...

    Red-tailed Hawk

    Overview The distant, soaring buteo that holds its position in a stiff breeze as if "pinned to the...

    Common Shelduck

    Overview The shelducks are a group of larger, often semi-terrestrial waterfowl, which can be seen as intermediate between...

    Northern Pygmy-Owl

    Appearance The Northern Pygmy-Owl (Glaucidium gnoma) is tiny indeed no bigger than a good-sized-sparrow. It has two distinctive...