dr. miguel fortes is a scientist based here, together with colleagues of japan, he has been researching boracaysland since 2012. dr. fortes has focused on the coral off shore to try to understand the causes of the beach erosion. >> coral reef, what is a coral reef? >> coral reef is a structure dominated by corals. the animal s are the products o symbiotic partnership between coral animals and plants. microscopic plants. they live together, and living together, they form what we now see as the corals. the corals form as an ecosystem, the coral reef. >> corals are related to sea on the surface of the corals are are numerous small tentacles known as polyps. inside the polyps live phytoplanki tn, producing am aminoacids. these amino acids are absorbed by the nutrients. calcium within seawater, calcium carbonate skeleton. the slow growing coral is very sensitive to changes in its environment. ♪ this satellite image shows the seabed around boracay island. the island is in the middle. the coral areas are shown in pink. dr. fortes has paid keen attention to the change of coral in the sea off white beac