Below is a table with the seas of the Atlantic Ocean, which includes their names, area (in thousands of square kilometers), average and greatest depth (in meters).
| number | Name of the sea | Average depth, m | Maximum depth, m | |
| 1 | The Azov | 39 | 7,5 | 13,5 |
| 2 | The Baltic | 419 | 51 | 470 |
| 3 | Hebrides | 47 | 64 | 137 |
| 4 | Irish | 100 | 43 | 175 |
| 5 | Iroise | 3,55 | 80 | 250 |
| 6 | caribbean | 2753 | 2500 | 7686 |
| 7 | Celtic | 300 | 150 | 366 |
| 8 | Irminger Sea | 780 | 1800 | 3124 |
| 9 | Labrador | 841 | 1950 | 4316 |
| 10 | Marble | 11,472 | 677 | 1355 |
| 11 | Sargassovo | 6000 – 7000 | 2100 | 6995 |
| 12 | 750 | 95 | 725 | |
| 13 | 2500 | 1541 | 5121 | |
| 14 | Black | 422 | 1240 | 2210 |
Atlantic sector of the Southern Ocean
| number | Name of the sea | Average depth, m | Maximum depth, m | |
| 1 | The sea of Lazarev | 335 | 3000 | 4500 |
| 2 | The sea of Scotia | 1300 | 3096 | 6022 |
| 3 | The Weddell Sea | 2920 | 3000 | 6820 |
These are the seas of the Atlantic Ocean, which are part of the Southern Ocean, conditionally distinguished as the fifth.
Notes:
- The North Sea also includes the Wadden Sea.
- The Mediterranean Sea includes the following seas:
- Adriatic
- Alboran
- Balearic
- Ionian
- Cypriot (includes: Cilician and Levantine)
- Ligurian
- Tyrrhenian
- Aegean (includes: Icarian, Cretan, Myrtoan, Thracian)