The structural species. Sea grass serve asThe structural species. Sea grass serve as

The Philippines is an archipelago of about 7,100 island, surrounded by the South China Sea in the west, Sulu Sea and Celebes Sea in the south, the Philippine Sea, which opens into the Pacific Ocean, in the east, and the Luzon Strait in the north. Philippines is divided into four geographical regions; the Luzon Region, including the islands of Luzon, Babuyan, Catanduanes, Mindoro, Masbate, Romblon, and Marinduque; the Mindanao region, including Mindanao, Basilan, and the Sulu Group; the Visayas region, including Samar, Leyte, Bohol, Cebu, Negros, and Panay; and the Palawan region, including Palawan, Balabac, Culion, and the Cuyo Group. Philippines has extensive sea grass and algal beds and soft-bottom communities that often occur in close proximity to mangroves and coral reefs, sea grasses ecosystems have a very high primary productivity and play an important role in the Philippine marine environment. sea grasses are a prominent component of Philippine coastal ecosystems, sea grasses are biota and habitat in one, they naturally and simultaneously function both as primary producers and structural species. Sea grass serve as habitats and breeding grounds for various marine organisms that are economically important to the local populace, sea grasses is obe of the most important resources in the coastal area, its ecosystem is  a good place for the spawning, breeding, nursing and refuge (Fortes 1989) of these organisms. Sea grasses are not true grasses, this are a vascular plants. The vascular system in the sea grasses consists of an internal network of tubes that is continuous from the roots to the leaf tips, transporting water, nutrients, and gases for tissue growth. Because of this system, sea grass growing in sand or mud can use the highly concentrated nutrients of the bottom, nutrients that may be hundreds or thousands of times more concentrated than those in the overlying water column. Sea grasses in the Philippines are important food for the marine green turtles and dugong.  Accorfing to Len McKenzie “Sea grass Watch”there are 13 seagrass speciesthat can be found in the Phiippines, Cymodocea rotundata, Cymodocea serrulata, Enhalus acoroides, Halodule pinifolia, Halodule uninervis, Halophila beccarii, Halophila decipiens, Halophila minor/ovata, Halophila ovalis, Halophila spinulosa, Syringodium isoetifolium, Thalassodendron ciliatum and Thalassia hemprichii (Spalding 2000). These species of sea grasses present contrasting growth forms and growth capacities, from the small, fast-growing Halophila species to the large E. acoroides. The contrasting growth strategies have been postulated to confer on them differential capacities to survive disturbance (Terrados et al., 1998). In Philippine, the demonstration site of sea grasses has been established in Bolinao, Pangasinan and a seagrass sanctuary, in Narra, Palawan,  In Bolinao, the main achievements included the development of a management plan that has been adopted by the local government, development of a Bolinao Seagrass Reserve, implementation of a sustained information, education and communication program, capacity building and provision of alternative livelihood programs. Local law enforcement in habitat management using the Bantay Dagat (Sea Watch) has also been instituted (UNEP, 2008). Enhalus is one of the most prominent seagrasses in the Philippines,nhalus produces 2.8 flowers per shoot per year on average and allocates up to 20% of its aboveground production to flowering and fruiting, in the reef flats off Cape Bolinao, this species is able to colonize various habitat types (Vermaat et al., 1995; Rollón et al., 1998): muddy to Enhalus shoots differ in morphology, biomass and density (Rollón, 1998). The other prominent sea grasses in Philippines that can be found in Bolinao isThalassia Hemprichii.