As of 2026-07-08, Coral Sea tops the list with 9,175 m.
- #1 Coral Sea — 9,175 m
Marginal sea in the Pacific Ocean off the northeast coast of Australia
The Coral Sea is a marginal sea of the South Pacific off the northeast coast of Australia, and classified as an interim Australian bioregion. The Coral Sea extends 2,000 kilometres (1,200 mi) down the Australian north-east coast to latitude 30° south. Most of it is protected by the French Natural Park of the Coral Sea and the Australian Coral Sea Marine Park. The sea was the location for the Battle of the Coral Sea, a major confrontation during World War II between the navies of the Empire of... Read more on Wikipedia.
Wikidata - #2 Weddell Sea — 6,820 m
part of the Southern Ocean between Coats Land and the Antarctic Peninsula
The Weddell Sea is part of the Southern Ocean and contains the Weddell Gyre. Its land boundaries are defined by the bay formed from the coasts of Coats Land and the Antarctic Peninsula. The easternmost point is Cape Norvegia at Princess Martha Coast, Queen Maud Land. To the east of Cape Norvegia is the King Haakon VII Sea. Much of the southern part of the sea is covered by a permanent, massive ice shelf field, the Filchner-Ronne Ice Shelf. Read more on Wikipedia.
Wikidata - #3 Celebes Sea — 6,200 m
Interisland Sea in the Pacific Ocean
The Celebes Sea or Sulawesi Sea of the western Pacific Ocean is bordered on the north by the Sulu Archipelago and Sulu Sea and Mindanao Island of the Philippines, on the east by the Sangihe Islands chain, on the south by Sulawesi's Minahasa Peninsula, and the west by northern Kalimantan in Indonesia. It extends 605 km (376 mi) north-south by 780 km (485 mi) east-west and has a total surface area of 472,000 km2 (182,000 sq mi), to a maximum depth of 6,220 metres (20,406 ft). South of the... Read more on Wikipedia.
Wikidata - #4 Ionian Sea — 5,267 m
an elongated bay of the Mediterranean Sea, south of the Adriatic Sea, bounded by Southern Italy (Calabria, Sicily, Salento peninsula) to the west, southern Albania to the north, and the west coast of Greece to the east
The Ionian Sea is an elongated bay of the Mediterranean Sea. It is connected to the Adriatic Sea to the north, and is bounded by Southern Italy, including Basilicata, Calabria, Sicily, and the Salento peninsula to the west, southern Albania to the north, and the west coast of Greece, including the Peloponnese. Read more on Wikipedia.
Wikidata - #5 Cantabrian Sea — 4,750 m
sea in the southern Bay of Biscay of the North Atlantic Ocean
The Cantabrian Sea is the term used mostly in Spain to describe the coastal sea of the Atlantic Ocean that borders the northern coast of Spain and the southwest side of the Atlantic coast of France, included in the Bay of Biscay. It extends from Cabo Ortegal in the province of A Coruña, to the mouth of the river Adour, near the city of Bayonne on the coast of the department of Pyrénées-Atlantiques in French Basque Country. The Cantabrian Sea contains the Avilés Canyons System. Read more on Wikipedia.
Wikidata - #6 Bellingshausen Sea — 4,470 m
sea along the west side of the Antarctic Peninsula
The Bellingshausen Sea is marginal sea located along the west side of the Antarctic Peninsula between 57°18'W and 102°20'W, west of Alexander Island, east of Cape Flying Fish on Thurston Island, and south of Peter I Island. The Bellingshausen Sea borders the Eights Coast, the Bryan Coast, and the west part of the English Coast in Antarctica. To the west of Cape Flying Fish it joins the Amundsen Sea. The Bellingshausen Sea has an area of 487,000 km2 (188,000 sq mi) and reaches a maximum... Read more on Wikipedia.
Wikidata - #7 Norwegian Sea — 3,970 m
marginal sea in the North Atlantic Ocean
The Norwegian Sea is a marginal sea, grouped with either the Atlantic Ocean or the Arctic Ocean, northwest of Norway between the North Sea and the Greenland Sea, adjoining the Barents Sea to the northeast. In the southwest, it is separated from the Atlantic Ocean by a submarine ridge running between Iceland and the Faroe Islands. To the north, the Jan Mayen Ridge separates it from the Greenland Sea. Read more on Wikipedia.
Wikidata - #8 Andaman Sea — 3,777 m
sea of the Indian Ocean
The Andaman Sea is a marginal sea of the northeastern Indian Ocean bounded by the coastlines of Myanmar and Thailand along the Gulf of Martaban and the west side of the Malay Peninsula, and separated from the Bay of Bengal to its west by the Andaman Islands and the Nicobar Islands. Its southern end is at Breueh Island just north of Sumatra, with the Strait of Malacca further southeast. Read more on Wikipedia.
Wikidata - #9 Sea of Japan — 3,742 m
marginal sea between Japan, Russia, and Korea
The Sea of Japan (see § Names for other names) is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific Ocean. This isolation also affects faunal diversity and salinity, both of which are lower than in the open ocean. The sea has no large islands, bays... Read more on Wikipedia.
Wikidata - #10 Laptev Sea — 3,385 m
sea in Arctic Ocean
The Laptev Sea is a marginal sea of the Arctic Ocean. It is located between the northern coast of Siberia, the Taimyr Peninsula, Severnaya Zemlya, and the New Siberian Islands. Its northern boundary passes from the Arctic Cape to a point with co-ordinates of 79°N and 139°E, and ends at the Anisiy Cape. The Kara Sea lies to the west, the East Siberian Sea to the east. Read more on Wikipedia.
Wikidata