Question: What is situated in the Arctic Ocean that is 55 km long, and is south to an islet south of the peninsula of Eggøya that is located just about 80 meters west of the point of Eggøyodden?

Context paragraphs:
Greenland Sea: The Greenland Sea is a body of water that borders Greenland to the west, the Svalbard archipelago to the east, Fram Strait and the Arctic Ocean to the north, and the Norwegian Sea and Iceland to the south.  The Greenland Sea is often defined as part of the Arctic Ocean, sometimes as part of the Atlantic Ocean.  However, definitions of the Arctic Ocean and its seas tend to be imprecise or arbitrary.  In general usage the term "Arctic Ocean" would exclude the Greenland Sea.  In oceanographic studies the Greenland Sea is considered part of the Nordic Seas, along with the Norwegian Sea.  The Nordic Seas are the main connection between the Arctic and Atlantic oceans and, as such, could be of great significance in a possible shutdown of thermohaline circulation.  In oceanography the Arctic Ocean and Nordic Seas are often referred to collectively as the "Arctic Mediterranean Sea", a marginal sea of the Atlantic.

Ilhéu Rabo de Junco: Ilhéu Rabo de Junco is an uninhabited islet near the west coast of Sal Island, Cape Verde.  It lies about 270 to 500 meters from the coast, its length is 253 meters long and 165 meters wide, its shoreline is about 878 m long.  It is the only islet next to the island of Sal.  The island has been designated a protected area as a nature reserve Baía da Murdeira is to the east, southeast of the islet, further east is the highest point in southern Sal named Monte Leão (the Lion Hill) elevating 165 meters.  Together with the nearby island's headland, it is the area that is closest headland to the island of São Nicolau at Ponta Leste being 109 km west.

Praia Harbor: Praia Harbor or Porto da Praia is the city's harbor located southeast of Praia and south of the island of Santiago, Cape Verde.  Its length is 8.6 km stretching from the points of Temerosa through Ribeira da Trindade northwest up to Bicudas.  It is now divided into two parts since 2014, the western part is 5 km long stretching up to Ponta do Porto (formerly Ponta de Visconde) and 3 km east to Ponta das Bicudas.  Its length is 2.82 km and its width is 1.67 km, the western width is 1.1 km and its eastern length is 1.5 km and the width is around 600 meters.  From the islet to Ponta do Porto is only less than 490 meters and 2.4 km up to Ponta das Bicudas.  In the middle is the Port of Praia, the island and country's chief port (sometimes second to São Vicente's port at Porto Grande Bay), one of its shipping lanes connect to the nearby Port of Dakar in Senegal.  The port's location being inside the Atlantic Ocean sits at or within the major sea-lanes linking Europe to South America, the other linking North America to southern Africa or Australia, much of its ships bypasses the archipelago today, ships heading to the port mainly supplies the nation especially foodstuffs.  The port has a container terminal and is also the fishing port where fishing boats dock and supply the island with seafood and has its own fishery and cannery.

Eggøykalven: Eggøykalven ("Egg Island Calf") is an islet south of the peninsula of Eggøya at the southern part of Jan Mayen.  It is located just about 80 meters west of the point of Eggøyodden, and southeast of the bay Eggøybukta.  The islet was earlier much higher, but has been significantly worn down by the ocean.

Ponta João Ribeiro: Ponta João Ribeiro is a cape in the northern part of the island of São Vicente, Cape Verde.  It is nearly 3 km north of the island capital of Mindelo, it recently forms the northern urban area and the city of Mindelo and belongs to the neighborhood of Laginha (or Lajinha).  The cape divides the Canal de São Vicente and the Porto Grande Bay.  The islet of Ilhéu dos Pássaros is approximately 1.3 km to the west.  Cliffs dominate the north and slopey areas in the south and one portion artificial land.  Nearly 100 meters west of the point is the 25th meridian west.

Nansenflua: Nansenflua is an undersea rock in the northern part of Rekvedbukta off the southeastern coast of Jan Mayen in the Arctic Ocean.  The shoal is named after the ship HNoMS "Fridtjof Nansen", which sank after striking the previously uncharted rock in November 1940.  Nansenflua is the only obstruction in Rekvedbukta.  The name "Nansenflua" was introduced in charts published by the Norwegian Polar Institute in 1955, and is included as a recognized name in Anders K. Orvin's 1960 paper "The place-names of Jan Mayen".  It follows a convention based on two then in force Orders in Council, dated 28 April 1933 and 31 May 1957, of using the Nynorsk grammatical form.  The suffix "-a" in the feminine definite form was chosen, as no local dialect existed on Jan Mayen.  The last part of the name, "flu(a)", means "rock awash", or "sunken rock".  The geographical location is given by Orvin as , with an exactitude of 1'.  The rock, located two meters under the surface, has a small top area and vertical sides of about twenty meters.  It is located about one nautical mile from Eggøykalven and 1.7 nautical miles west-southwest of the peninsula Eggøya.  In anything but completely calm weather conditions, Nansenflua is visible by waves being broken against it.  The rock is part of the remains of a crater.

Jan Mayen: Jan Mayen is a Norwegian volcanic island situated in the Arctic Ocean.  It is 55 km long (southwest-northeast) and 373 km2 in area, partly covered by glaciers (an area of 114.2 km around the Beerenberg volcano).  It has two parts: larger northeast Nord-Jan and smaller Sør-Jan, linked by a 2.5 km wide isthmus.  It lies 600 km northeast of Iceland (495 km (305 mi) NE of Kolbeinsey), 500 km east of central Greenland and 1000 km west of the North Cape, Norway.  The island is mountainous, the highest summit being the Beerenberg volcano in the north.  The isthmus is the location of the two largest lakes of the island, Sørlaguna (South Lagoon), and Nordlaguna (North Lagoon).  A third lake is called Ullerenglaguna (Ullereng Lagoon).  Jan Mayen was formed by the Jan Mayen hotspot.

Eggøya: Eggøya ("Egg Island") is a peninsula of Jan Mayen island of the Arctic Ocean.  It is located on the southern side, in the central part of the island, east of Sørlaguna, and defines the northeastern extension of the bay Rekvedbukta.  To the west of the peninsula is the bay Eggøybukta, and to the east is the bay Jamesonbukta.  The highest peak at the peninsula has a height of 217 m.a.s.l. Eggøya consists of the northern part of an old volcanic crater, and small hydrothermal vents are still present.  The outer part of the peninsula forms the semicircular bay of Kraterbukta, facing south-southeast with steep slopes.  To the south of the peninsula is a small islet, Eggøykalven.

Achada Grande Tras: Achada Grande Tras (meaning the rear portion of Achada Grande, former spelling: Achada Grande Trás) is a volcanic plateau and a subdivision in the east of Praia in the island of Santiago, Cape Verde and forming the easternmost neighborhood.  It is the largest neighborhood in Praia being about 25 km2 , 6 km long, and 4 km wide.  The highest point is about 120 meters at the extinct volcano, the elevation at the center is about 55 meters, the lowest point is the Atlantic and the Praia Harbor.  Other elevations are 67 meters at Monte Faxo, 110 meters at the extinct volcano, 80 to 100 meters at the airport, about 70 meters at Adega and 105 meters at the northwesternmost portion near the Circular Road (EN1-ST06).

Black Lake (Fond du Lac River, Saskatchewan): Black Lake is a lake in the Mackenzie River drainage basin in northern Saskatchewan, Canada.  It is about 55 km long, 17 km wide, has an area of 464 km2 , and lies at an elevation of 281 m .  The primary inflows are the Chipman River, Cree River, Fond du Lac River, and Souter River; the primary outflow is Fond du Lac River, which flows via the Mackenzie River into the Arctic Ocean.

Supporting paragraphs: Eggøykalven Jan Mayen
Answer: Norwegian volcanic island