All photographs are the original work of Nishan Perera, and cannot be used without the written consent of the photographer. Unauthorized use of images is a violation of intellectual property rights and may be subject to legal action.

Monday, March 7, 2011


Close up of a semicircle angelfish (Pomacanthus semicirculatus). This species is common on coral and rocky reefs in Sri Lanka, being most common on reefs with ledges and caves, as well as shipwrecks. Large angelfish are territorial, and males tend to defend a harem of several females. They are capable of making a loud clicking or thudding noise with their swimbladders and it is not uncommon for divers to hear this if a large angelfish is disturbed. Angelfish posses a cheek spine, as is visible in this photograph. This is the main distinguishing characteristic between angelfish and the closely related butterflyfish that do not posses such a spine.

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