Guimaras Strait

Guimaras Strait is a strait in the Western Visayas region of the Philippines, connecting the Visayan Sea with the Panay Gulf and Sulu Sea beyond. To the north and west are Panay and Guimaras Islands, while Negros Island is to the south and east.[1] Bacolod City is a major seaport on the strait, which also provides access to the Port of Iloilo City via the Iloilo Strait.

The Guimaras Strait is an important fishing ground in the Philippines, having an average of annual fish production of 50,000 metric tons. The northern part is particularly known for blue crab, a top export commodity. Other species present in the strait include barracuda, cavalla, clams, cockles, crevalle, dolphin, flounders, flying fish, fusilies, glassfish, goatfish, goby, grouper, jacks, jelly fish, lizard fish, marine turtle, milkffish, mojarra, moonfish, moray, mullets, mussels, scallops, oysters, perchlet, scads, sea bass, sea catfish, sea cucumber, sea perches, sea urchins, seaweeds, shads, sickle fish, siganids, sillago, slipmouth, snappers, spade fish, sponges, surgeon fish, threadfin, and wrasses.[2][3]

The Guimaras oil spill, that occurred in the Panay Gulf on August 11, 2006, has severely affected the fishing industry. During this spill, considered Philippines' worst, the oil tanker M/T Solar 1 sank during a violent storm, spilling some 500,000 litres (110,000 imp gal; 130,000 US gal) of oil which formed an oil slick that drifted through the strait.[4][5] This spill followed another one in December 2005, when a passenger ship ran aground in the strait. It spilled 360,000 litres (79,000 imp gal; 95,000 US gal) of fuel oil, polluting some 40 kilometres (25 mi) of coastline and 230 hectares (570 acres) of virgin mangrove forests.[6]

Besides these oil spills, the ecosystems of the Guimaras Strait also suffer from rapid coastal development and overfishing. Increased urban populations and transportation are causing anthropogenic pressures,[7] while gillnet fishing has exceeded the maximum sustainable yield since 1999.[8]

Guimaras Strait
Bacolod - Guimaras Strait
Guimaras Strait at Bacolod
Guimaras Strait map
RegionWestern Visayas
Physical characteristics
Length95 km (59 mi), N-S


  1. ^ "Quick Facts". Province of Guimaras. Retrieved 17 July 2013.
  2. ^ Melchor F. Cichon (13 September 2006). "Guimaras Strait: Focusing on Fish Production". Fisheries Librarian. Retrieved 15 July 2013.
  3. ^ "Community-Based Resource Management and Food Security of the Northern Guimaras Strait". WWF Philippines. 7 July 2008. Archived from the original on 6 March 2010. Retrieved 15 July 2013.
  4. ^ Sarah Toms (15 August 2006). "Oil spill threatens Philippines". BBC News. Retrieved 15 July 2013.
  5. ^ Alimen, Rolando A.; Alimen, Cecilia D. (17 January 2013). "The After Effects of Oil Spill in Guimaras, Philippines". IAMURE International Journal of Marine Ecology. 1 (1). doi:10.7718/iamure.ijme.v1i1.338. Retrieved 15 July 2013.
  6. ^ "The PALSAR image of the heavy oil spill area, caused by a sunken tanker on August11, off Negros Island of the Philippines, in the Guimaras Strait (Observed on August 25)" (PDF). PALSAR Project. ERSDAC. September 1, 2006. Retrieved 17 July 2013.
  7. ^ "Guimaras Strait and surrounding coastal zone, Western Visayas PHILIPPINES". Study Sites. CECAM Project. Retrieved 17 July 2013.
  8. ^ "Philippine Blue Swimming Crab Fishery Improvement Project". Sustainable Fisheries Partnership. April 2013. Retrieved 17 July 2013.
11th parallel north

The 11th parallel north is a circle of latitude that is 11 degrees north of the Earth's equatorial plane. It crosses Africa, the Indian Ocean, South Asia, Southeast Asia, the Pacific Ocean, Central America, South America and the Atlantic Ocean.

At this latitude the sun is visible for 12 hours, 46 minutes during the summer solstice and 11 hours, 29 minutes during the winter solstice.In Thailand, a 1966 cabinet resolution restricts the rights of non-Thai companies to conduct mineral exploration or mining operations north of this parallel.

Anauayan Island

Anauayan Island is a small island in northeastern Iloilo, Philippines. It is part of the municipality of Concepcion.

Guimaras (disambiguation)

Guimaras (disambiguation) may refer to:

Guimaras, an island province in the Philippines

Guimaras oil spill

Guimaras State College

Guimaras Strait

Guimaras oil spill

The Guimaras oil spill occurred in the Panay Gulf on August 11, 2006 when the oil tanker MT Solar 1 sank off the coast of Guimaras and Negros islands in the Philippines, causing what is considered as the worst oil spill in the country.

Guiuanon Island

Guiuanon Island (or Guiwanon Island) is an island barangay located beside Panubulon Island southeast of Nueva Valencia, Guimaras in the Philippines. The island was affected by an oil spill on August 11, 2006.


Iloilo (Hiligaynon: Kapuoran sang Iloilo; Kinaray-a: Kapuoran kang Iloilo) is a province located in the region of Western Visayas in the Philippines. Iloilo occupies a major southeast portion of the Visayan island of Panay and is bordered by the province of Antique to the west, Capiz to the north, the Jintotolo Channel to the northeast, the Guimaras Strait to the east, and the Iloilo Strait and Panay Gulf to the southwest.

Just off Iloilo's southeast coast is the island province of Guimaras, once part of Iloilo but now an independent province. Across the Panay Gulf and Guimaras Strait is Negros Occidental, occupying the northwestern half of the larger island of Negros. Iloilo's capital is Iloilo City, though the city itself is independent and not governed by the provincial government. According to the 2015 census, the population of the province (excluding Iloilo City) is 1,936,423. If Iloilo City is included, the population is 2,361,042 in total.

Iloilo Strait

The Iloilo Strait is a strait in the Philippines that separates the islands of Panay and Guimaras in the Visayas, and connects the Panay Gulf with the Guimaras Strait. It is the location of the Port of Iloilo, the third-busiest of the ports in the Philippines in number of ships. Iloilo City on Panay is the major city located on the strait with Buenavista and Jordan, both on Guimaras, immediately across the strait from the city. The Iloilo River empties into the strait.

Pumpboat ferries cross every few minutes from Iloilo City to Guimaras and vice versa. Ships doing business with the Port of Iloilo often moor in the strait.

Jalaur River

Jalaur River, also known as Jalaud River, is the second longest river in Panay island and the second largest by drainage basin, only Panay River in Capiz has the longest and the largest river system in Panay. Jalaur river ranked 17th largest river system in the Philippines in terms of drainage basin size. It has an estimated drainage area of 1,503 square kilometres (580 sq mi) and travels 123 kilometres (76 mi) from its source to its mouth in the Guimaras Strait. It drains the eastern portion of the island and traverses through Passi City and the towns of Leganes, Zarraga, Dumangas, Barotac Nuevo, Pototan, Dingle, San Enrique, Duenas, and Calinog.The river is of great economic importance to the province of Iloilo. It provides irrigation to farmlands in the province as well as providing a source of potable water for its inhabitants.

List of ports in the Philippines

The following is a list of major ports in the Philippines organized by water mass.

This list consists primarily of shipping ports, but also includes some that are primarily or significantly devoted to other purposes: cruises, fishing, local delivery, and marinas.

Negros Occidental

Negros Occidental (Hiligaynon: Nakatungdang Negros), also known as Occidental Negros or Western Negros, is a province located in the region of Western Visayas, in the Philippines. It occupies the northwestern half of the large island of Negros, and borders Negros Oriental, which comprises the southeastern half. Known as the "Sugarbowl of the Philippines", Negros Occidental produces more than half the nation's sugar output.

Negros Occidental faces the island-province of Guimaras and the province of Iloilo on Panay Island to the northwest across the Panay Gulf and the Guimaras Strait. The primary spoken language is Hiligaynon and the predominant religious denomination is Roman Catholicism. Bacolod City is the capital, seat of government and the most populous city of the province, but is governed independently as a highly urbanized city. With a population of 2,497,261 inhabitants, it is the most populated province in Western Visayas, the second most-populous province in the Visayas after Cebu and the 8th most-populous province of the Philippines.

Pan de Azucar Island (Iloilo)

Pan de Azucar (variously Tampisaw Island or Tambaliza [which is also the name of one of the barangays on the island]) is a populated island in the Visayan Sea in the Philippines. The island is known for Mount Pan de Azucar (Mount Sugarloaf) a steep volcanic cone and a prominent landmark at the northern entrance of Guimaras Strait.Pan de Azucar is under the jurisdiction of the municipality of Concepcion, Iloilo on Panay Island, one of the largest and major islands of the Philippines. Pan de Azucar is the largest of 16 outlying islands of the town and makes up nearly 19 percent of Concepcion's total land area. According to the 2010 census, the island has a population of 2,999.The island possibly contains valuable mineral deposits and is being studied for mineral extraction, which could possibly destroy the natural beauty of the island and mountain.


Panay is the sixth-largest and fourth most-populous island in the Philippines, with a total land area of 12,011 km2 (4,637 sq mi) and with a total population of 4,477,247. Panay comprises 4.4 percent of the entire population of the country. The City of Iloilo is its largest settlement with a total population of 447,992 inhabitants. It is a triangular island, located in the western part of the Visayas. It is about 160 km (99 mi) across. It is divided into four provinces: Aklan, Antique, Capiz and Iloilo, all in the Western Visayas Region. Just closely off the mid-southeastern coast lies the island-province of Guimaras. It is located southeast of the island of Mindoro and northwest of Negros across the Guimaras Strait. To the north and northeast is the Sibuyan Sea, Jintotolo Channel and the island-provinces of Romblon and Masbate; to the west and southwest is the Sulu Sea and the Palawan archipelago and to the south is Panay Gulf. Panay is the only main island in the Visayas whose provinces don't bear the name of their island.

Panay is bisected by the Central Panay Mountain Range, its longest mountain chain. The island has many rivers, the longest being the Panay River at a length of 152 kilometres (94 mi), followed by the Jalaur, Aklan, Sibalom, Iloilo and Bugang rivers. Standing at about 2,117 m (6,946 ft), the dormant Mount Madia-as (situated in Culasi, Antique) is the highest point of the island, with Mount Nangtud (located between Barbaza, Antique and Jamindan, Capiz) following next at 2,073 m (6,801 ft).

Panay Gulf

Panay Gulf is an extension of the Sulu Sea, reaching between the islands of Panay and Negros in the Philippines. The gulf contains the island-province of Guimaras and extends into the Santa Anna Bay between Panay and Guimaras and into Guimaras Strait, between Guimaras and Negros. Guimaras Strait connects Panay Gulf with the Visayan Sea.

The Port of Iloilo is the busiest port on the gulf, which is a major route used by ships plying the areas between Iloilo City, Bacolod City, and Zamboanga further to the south.

The Panay Landing during World War II occurred from the Panay Gulf.

Panubulon Island

Panubulon Island (or Panobolon Island) is an island barangay located southeast of Nueva Valencia, Guimaras in the Philippines. Beside Panubulon is Guiuanon Island. This island was affected by an oil spill last August 11, 2006.

Sulu Sea

The Sulu Sea (Filipino: Dagat ng Sulu, Tausug: Dagat sin Sūg; Chavacano: Mar de Sulu; Cebuano: Dagat sa Sulu; Hiligaynon: Dagat sang Sulu; Karay-a: Dagat kang Sulu; Cuyonon: Dagat i'ang Sulu; Malay: Laut Sulu) is a body of water in the southwestern area of the Philippines, separated from the South China Sea in the northwest by Palawan and from the Celebes Sea in the southeast by the Sulu Archipelago. Borneo is found to the southwest and Visayas to the northeast.

Sulu Sea contains a number of islands. The Cuyo Islands and the Cagayan Islands are part of the province of Palawan whereas Mapun and the Turtle Islands are part of the province of Tawi-Tawi . Sulu Sea is also where the Tubbataha Reef National Marine Park, one of the World Heritage Sites is located.The Panay Gulf is an extension of the Sulu Sea. Straits out of the Sulu Sea include the Iloilo Strait, the Guimaras Strait, and the Basilan Strait.

Tagubanhan Island

Tagubanhan Island is a wooded island in northeastern Iloilo, Philippines. It is part of the municipality of Concepcion.

Unisan Island

Unisan Island is a small island located in southernmost part of Nueva Valencia, Guimaras and beside Malingin Island in the Philippines.

Valladolid, Negros Occidental

Valladolid, officially the Municipality of Valladolid, is a 4th class municipality in the province of Negros Occidental, Philippines. According to the 2015 census, it has a population of 37,833 people.Known as the "Food Basket of Negros Occidental," the municipality celebrates its fiesta every 28 February.

Visayan Sea

The Visayan Sea is a sea in the Philippines surrounded by the islands of the Visayas: Western Visayas, Eastern Visayas, and Central Visayas to the south. It is bounded by the islands Masbate to the north, Panay to the west, Leyte to the east, and Cebu & Negros to the south.

The sea is connected to the Sibuyan Sea to the northwest via the Jintotolo Channel, the Samar Sea to the northeast, the Panay Gulf (part of the Sulu Sea) to the southwest via the Guimaras Strait, and the Camotes Sea to the southeast.

The largest island within this sea is Bantayan Island of Cebu province.



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