Kalamansig, officially the Municipality of Kalamansig (, Jawi: ايڠايد نو كلامانسيڬ), is a 1st class municipality in the province of Sultan Kudarat, Philippines. According to the 2020 census, it has a population of 50,900 people. The main means of livelihood of the people is farming and fishing. The municipality's marine environment is home to various species of marine wildlife and plants, the most important of which is the giant tamilok, the largest shipworm species in the world. The species can only be found within the area, and no where else in the world, making Kalamansig an important biodiversity area. Formerly hunted by the locals, the giant tamiloks are now strictly protected by the municipality, specifically the former hunters of the species, after research confirmed the high importance of the species in the area's biodiversity. The nearest point of entry is through Cotabato Airport, Cotabato City. The town can easily be reached by taking the fully cemented Upi-Lebak National Road. Convenient and safe public transport that plies directly to Kalamansig are also available at NCCC Mall Davao, General Santos Public Terminal, Cotabato City Lebak-Kalamansig Terminal and Tacurong City Public Terminal. Etymology Like most municipalities in the Philippines, Kalamansig traces its name from various legendary origins. A popular folklore among the Manobos, a tribe of people who were among the earliest inhabitants of the place, explained that the name originated from a phrase “Kulaman-su-wayeg”, which literally translates as “Kulaman in the water”. Kulaman is said to be a famous Sultan of the Valley during the seventeenth century. According to the legend, a long famine came to the place and the Sultan, who was a loving father and provider to his family, ventured alone and gathered cassava, a staple food of the Manobos, for their consumption. Before returning home, the Sultan decided to wash the root crop in a river, but a sudden and strong river current arrived and swept the aging Sultan from his feet, carrying him downstream and was drowned in the process. His body was later found and recovered downriver, coining the word “Kulaman-sa-ig” (Kulaman in the water). The name evolved into “Kalamansig” which later become the official name. In honor of this Manobo tribal leader, the river where he was found was named after him and later, the entire upper valley was called “Kulaman”. This barangay is now part of the Municipality of Sen. Ninoy Aquino. History The existing