The Cantabrian Sea is the term used mostly in

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

to describe the coastal

sea A sea is a large body of salt water. There are particular seas and the sea. The sea commonly refers to the ocean, the interconnected body of seawaters that spans most of Earth. Particular seas are either marginal seas, second-order section ...

of the

Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...

that borders the northern coast of

and the southwest side of the Atlantic coast of

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

, included in the

Bay of Biscay The Bay of Biscay ( ) is a gulf of the northeast Atlantic Ocean located south of the Celtic Sea. It lies along the western coast of France from Point Penmarc'h to the Spanish border, and along the northern coast of Spain, extending westward ...

. It extends from Cabo Ortegal in the

province of A Coruña The province of A Coruña ( ; ; historical ) is the northwesternmost province of Spain, and one of the four provinces which constitute the autonomous community of Galicia. This province is surrounded by the Atlantic Ocean to the west and north ...

, to the mouth of the river

Adour The Adour (; ; ) is a river in southwestern France. It rises in High- Bigorre ( Pyrenees), in the commune of Aspin-Aure, and flows into the Atlantic Ocean ( Bay of Biscay) near Bayonne. It is long, of which the uppermost ca. is known as the ' ...

, near the city of

Bayonne Bayonne () is a city in southwestern France near the France–Spain border, Spanish border. It is a communes of France, commune and one of two subprefectures in France, subprefectures in the Pyrénées-Atlantiques departments of France, departm ...

on the coast of the department of

Pyrénées-Atlantiques Pyrénées-Atlantiques (; Gascon language, Gascon Occitan language, Occitan: ''Pirenèus Atlantics''; ) is a Departments of France, department located in the Regions of France, region of Nouvelle-Aquitaine in the southwest corner of metropolitan ...

French Basque Country The French Basque Country (; ; ), or Northern Basque Country (, or , ), is a region lying on the west of the French department of the Pyrénées-Atlantiques. Since 1 January 2017, it constitutes the Basque Municipal Community (; ) presided ...

. The Cantabrian Sea contains the Avilés Canyons System. The sea borders of coastline shared by the Spanish provinces of

A Coruña A Coruña (; ; also informally called just Coruña; historical English: Corunna or The Groyne) is a city and municipality in Galicia, Spain. It is Galicia's second largest city, behind Vigo. The city is the provincial capital of the province ...

Lugo Lugo (, ) is a city in northwestern Spain in the autonomous communities of Spain, autonomous community of Galicia (Spain), Galicia. It is the capital of the Lugo (province), province of Lugo. The municipality had a population of 100,060 in 2024, ...

Asturias Asturias (; ; ) officially the Principality of Asturias, is an autonomous communities of Spain, autonomous community in northwest Spain. It is coextensive with the provinces of Spain, province of Asturias and contains some of the territory t ...

Cantabria Cantabria (, ; ) is an autonomous community and Provinces of Spain, province in northern Spain with Santander, Cantabria, Santander as its capital city. It is called a , a Nationalities and regions of Spain, historic community, in its current ...

Biscay Biscay ( ; ; ), is a province of the Basque Country (autonomous community), Basque Autonomous Community, heir of the ancient Lordship of Biscay, lying on the south shore of the Bay of Biscay, eponymous bay. The capital and largest city is Bilb ...

and

Gipuzkoa Gipuzkoa ( , ; ; ) is a province of Spain and a historical territory of the autonomous community of the Basque Country. Its capital city is Donostia-San Sebastián. Gipuzkoa shares borders with the French department of Pyrénées-Atlantiqu ...

, and the French area of

Labourd Labourd (; ; ; ) is a former French province and part of the present-day Pyrénées Atlantiques '' département'' of Nouvelle-Aquitaine region. It is one of the traditional Basque provinces, and identified as one of the territorial component pa ...

Explanatory notes

References

Bay of Biscay European seas Marginal seas of the Atlantic Ocean Seas of France Seas of Spain {{Marine-geo-stub