Several key factors were identified as the cause of the occurrences of Currents, Storms, Waves, Man-made Structures and Human Activity. Thus, the effects of the Tropical Storm Hilda that has hit Sipdan was found to have a profound effect on the ecology of Sipadan island. Extensive damage was sustained by hard corals in shallow waters when repeatedly pounded by the big waves caused by winds of between 62 and 88 km/h. Evidence of this damage was in the form of recently-broken pieces of hard coral, namely staghorn coral (Acropora sp.) that were found washed ashore. Sea turtles that normally resided in shallow areas moved to deeper waters to escape the pounding waves.
Following by the study of coastal processes recently, the research group led by Dr. Ejria Salleh from UMS found, Sipadan Island beach changes occur through erosion of beaches on the west coast of the island is exposed to the monsoon from June to September. Northeast monsoon from December to April attracted to the sand near the jetty. Due to the natural, the Sipadan Island is losing sand cause sand due to wave energy brought to the lagoon and meet the sea.
Also, this incident also clearly visible on the island of Gulisan and Selingan at Turtle Islands Park.