· Adriatic Sea 18 573.1 23 43 — · North Sea 10 76.5 3 56 — · South Atlantic Ocean 9 220.8 6 213 — · Eastern China Sea 9 49.6 3 35 — · Tyrrhenian Sea 7 170.2 6 101 — · South Atlantic Ocean 7 70.4 2 46 — · North Pacific Ocean 7 43.1 1 19 — · North Atlantic Ocean 7 25.4 0 — — · Celtic Sea 6 71.6 3 281 — · Aegean Sea 6 69.7 3 177 — · English Channel 6 52.7 2 23 — · North Sea 6 37.1 0 — — · North Atlantic Ocean 5 62.8 4 65 — · North Pacific Ocean 5 60 2 34 — · Tyrrhenian Sea 5 41.5 2 29 — · North Atlantic Ocean 5 32.2 2 15 — · Coral Sea 4 91.7 5 218 — · North Atlantic Ocean 4 91.1 5 363 — · Inner Seas off the West Coast of Scotland 4 63.9 2 41 — · North Pacific Ocean 4 42 1 330 — · Southern Ocean 4 29.6 0 — — · North Pacific Ocean 4 22.5 0 — — · Mediterranean Sea - Western Basin 4 21.2 0 — — · Philippine Sea 4 12 0 — — · South Pacific Ocean 4 12 0 — — · Ligurian Sea 4 8.7 1 22 — · North Atlantic Ocean 3 104.4 4 85 — · North Pacific Ocean 3 63.8 2 41 — · North Atlantic Ocean 3 50.4 2 35 — · South China Sea 3 45.1 0 — — · Mediterranean Sea - Western Basin 3 39.6 2 30 — · Tyrrhenian Sea 3 24.1 0 — — · South Atlantic Ocean 3 23.1 2 20 — · Yellow Sea 3 16.4 1 16 — · Philippine Sea 3 12.3 1 61 — · Persian Gulf 3 11.6 0 — — · Irish Sea and St. George's Channel 3 7.1 1 29 — · Adriatic Sea 3 4.8 0 — — · Adriatic Sea long running 2 83.9 1 926 — · Mediterranean Sea - Western Basin 2 58.6 2 358 — · North Atlantic Ocean 2 37 0 — — · Celtic Sea 2 36.4 2 196 — · Tyrrhenian Sea 2 32.3 1 35 — · South China Sea 2 29 2 28 — · South Pacific Ocean 2 27.1 2 52 — · Tyrrhenian Sea 2 26 0 — — · South Pacific Ocean 2 24.3 1 24 — · Gulf of Mexico 2 20 1 22 — · North Atlantic Ocean 2 18.3 0 — — · The Coastal Waters of Southeast Alaska and British Columbia 2 18 1 19 — · North Pacific Ocean 2 9 0 — — · Balearic (Iberian Sea) 2 7.6 0 — — · English Channel 2 6.4 1 6 — · Norwegian Sea 2 6 0 — — · South Atlantic Ocean 2 6 0 — — · Ionian Sea 2 2.6 0 — — · English Channel 2 2.4 2 2 — · North Sea 2 1.8 0 — — · English Channel 2 1.6 0 — — · Bass Strait 2 1.2 0 — — · North Sea long running 1 120.5 5 758 — · Adriatic Sea 1 42.2 2 103 — · Persian Gulf 1 37.5 2 83 — · Persian Gulf 1 35.7 2 195 — · South Pacific Ocean 1 35.7 2 140 — · South Atlantic Ocean 1 34.2 1 246 — · Black Sea 1 31.6 1 54 — · Malacca Strait 1 30.6 2 50 — · Indian Ocean 1 30.1 1 98 — · Singapore Strait 1 28.6 1 28 — · Persian Gulf 1 23.7 1 23 — · North Atlantic Ocean 1 22.3 1 22 — · Greenland Sea 1 21.9 1 21 — · Gulf of Oman 1 18.2 1 18 — · Mediterranean Sea - Eastern Basin 1 17 0 — — · North Atlantic Ocean 1 15.6 1 70 — · Persian Gulf 1 15.6 0 — — · Mediterranean Sea - Eastern Basin 1 15 1 15 — · Ligurian Sea 1 14.7 0 — — · North Pacific Ocean 1 14 0 — — · South Atlantic Ocean 1 13.3 1 13 — · North Pacific Ocean 1 13 0 — — · South Pacific Ocean 1 10 1 9 — · Inner Seas off the West Coast of Scotland 1 9.7 0 — — · North Atlantic Ocean 1 9.7 1 9 — · Inner Seas off the West Coast of Scotland 1 9.6 1 9 — · Aegean Sea 1 9.3 0 — — · South Atlantic Ocean 1 8.8 1 8 — · Philippine Sea 1 8.3 1 8 — · Indian Ocean 1 7.2 0 — — · English Channel 1 5.8 1 5 — · South Atlantic Ocean 1 5.8 0 — — · English Channel 1 3.9 0 — — · Arafura Sea 1 3 0 — — · Bismarck Sea 1 3 0 — — · Caribbean Sea 1 3 0 — — · Molukka Sea 1 3 0 — — · South China Sea 1 2.6 0 — — · Coral Sea 1 1.8 1 1 — · Gulf of Alaska 1 1.2 1 1 — · Mediterranean Sea - Western Basin 1 1 0 — — · Bristol Channel 1 0.6 0 — — · Philippine Sea 1 0.6 1 0 — · Celtic Sea 1 0.5 1 0 — · Bering Sea 1 0.4 1 0 — · Irish Sea and St. George's Channel 1 0.3 0 — — · Persian Gulf long running 0 120 4 736 — · North Sea long running 0 77.4 2 379 — · Adriatic Sea 0 60 2 203 — · Mozambique Channel 0 60 2 256 — · North Pacific Ocean 0 60 2 152 — · North Sea long running 0 60 2 476 — · Adriatic Sea 0 30 1 76 — · English Channel long running 0 30 1 714 — · Gulf of Suez long running 0 30 1 390 — · Indian Ocean 0 30 1 38 — · Irish Sea and St. George's Channel 0 30 1 43 — · Irish Sea and St. George's Channel 0 30 1 71 — · Ligurian Sea 0 30 1 56 — · Mediterranean Sea - Eastern Basin long running 0 30 1 611 — · Mozambique Channel 0 30 1 285 — · Mozambique Channel 0 30 1 38 — · North Atlantic Ocean long running 0 30 1 470 — · North Pacific Ocean 0 30 1 30 — · North Pacific Ocean 0 30 1 31 — · Norwegian Sea 0 30 1 70 — · Persian Gulf 0 30 1 294 — · Red Sea long running 0 30 1 1,300 — · Solomon Sea 0 30 1 138 — · South China Sea 0 30 1 68 — · South China Sea 0 30 1 200 — · Tyrrhenian Sea 0 30 1 32 — · Tyrrhenian Sea 0 30 1 251 — · Malacca Strait 0 29.6 0 — — · South China Sea 0 28 0 — — · South Pacific Ocean 0 17.4 0 — — · Sulu Sea 0 17.4 0 — — · Tasman Sea 0 17.4 0 — — · North Atlantic Ocean 0 12.2 0 — — · Tasman Sea 0 10.6 0 — — · Great Australian Bight 0 7.1 0 — — · Coral Sea 0 3.4 0 — — · Gulf of Aden 0 3.4 0 — — · Makassar Strait 0 3.4 0 — — · Persian Gulf 0 3.4 0 — — · Philippine Sea 0 3.4 0 — — · South Atlantic Ocean 0 3.4 0 — — · Gulf of Mexico 0 1.2 0 — — · Ionian Sea 0 0 0 — —