Rumassala Marine Sanctuary

The Rumassala Marine Sanctuary encompasses a small near-shore coral reef growing on hard substrate around the base of the Rumassala hill in the sheltered waters of Galle Bay. Despite its small size, the reef is known for its rich biodiversity and is an important habitat for many marine species. It is important for small-scale fisheries, collection of ornamental fish and tourism. The reef has been degraded by the use of dynamite for fishing and coral bleaching.

Senanayake Samudraya

This wetland is primarily a large water storage reservoir created in 1951 by damming the Gal Oya at Inginiyagala as part of the Gal Oya Development scheme to open up 162,000 ha of forest for agricultural and industrial purposes. The tank is an important inland fishery source. The reservoir and its surroundings have been declared a Sanctuary, while the Sanctuary itself and the catchment of the wetland lie within the Gal Oya National Park. The area is rich in biodiversity. Furthermore this is an important habitat for elephants and water birds. As such, Birdlife International has identified this site as an IBA.

Tabbowa Reservoir

The Tabbowa reservoir is a medium sized, shallow water, ancient storage reservoir, constructed by damming the Nanneri Oya, a major tributary of the Mi Oya, for irrigation purposes. The reservoir was restored between 1913-1925 and then again in 1969. The wetland area has rich fossiliferous soils that are rare elsewhere in Sri Lanka. The tank and its environs are included within the Karuwalagaswewa Sanctuary, due to its importance as a habitat for elephants and water birds.