... Moorish Idon (zanclus cornutus), Blue ringed Angelfish (Pomacanthus Annularis), Emperor Angelfish (Pomacnthus Imperator) add extremely rich colors to the reef environment of the island. Hasksbill turtle (Eretmochelys Imbricata), green turtle (Chelonia Mydas), Loggerhead (Caretta Caretta), Leatherback (Dermochelys Coriacea) and Olive Ridley (Lepidochelys Oivacea) are the visiting sea turtles of the coral reefs and the surrounding sandy beach.

However, the island and the surrounding marine ecosystem at present under various influences of environmental and anthropogenic orient. Impacts caused by Crown-of-Thorns (COT) Starfish (Acanthaster Planch), fast growing sea algae (Halemeda and Caulerpa), thermal stress and fungal attacks are accelerating at an alarming rate. Due to its fascinating beauty, Pigeon Island is one of a fun spot in Sri Lanka favor visitors as a bathing beach and a snorkeling and scuba diving site. Tourism related activities such as snorkeling, diving, bathing, boat movements and fisheries related activities such as usage of non-sustainable fishing methods such as dynamiting and ornamental fish collection are common in the area. All these trigger chronic stress conditions that can ultimately contribute to the degradation of the ecosystem within the Pigeon Island National Park. Hence, wise and prudent use and management of resources such as banning of reef walking, controlling of boat movements, restriction of bathing activities, zonation of reef system, organizing of regular cleanups of invasive species, collection proper disposal of solid waste originated at the island, periodic monitoring and surveys would be suggested as immediate reef protection and management interventions.