As of 2026-10-12, 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 between 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... Read more on Wikipedia.
Wikidata - #2 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
source Wikidata - #3 Norwegian Sea — 3,970 m
marginal sea in the North Atlantic Ocean
source Wikidata - #4 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 - #5 Laptev Sea — 3,385 m
sea in the 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 - #6 Sea of Okhotsk — 3,374 m
marginal sea of the Pacific Ocean
The Sea of Okhotsk is a marginal sea of the northwestern Pacific Ocean. It is located between Russia's Kamchatka Peninsula on the east, the Kuril Islands on the southeast, Japan's island of Hokkaido on the south, the island of Sakhalin along the west, and a stretch of eastern Siberian coast along the west and north. Its northeast corner is the Shelikhov Gulf. The sea is named for the port of Okhotsk, itself named for the Okhota River. Read more on Wikipedia.
Wikidata - #7 Ligurian Sea — 2,569 m
arm of the Mediterranean Sea
source Wikidata - #8 Labrador Sea — 1,898 m
sea
source Wikidata - #9 Alboran Sea — 1,500 m
westernmost portion of the Mediterranean Sea
source Wikidata - #10 Barents Sea — 600 m
marginal sea of the Arctic Ocean, located off the northern coasts of Norway and Russia
The Barents Sea is a marginal sea of the Arctic Ocean, located off the northern coasts of Norway and Russia and divided between Norwegian and Russian territorial waters. Read more on Wikipedia.
Wikidata