| Country Name | Sea Name | Number of Ports | * Introductions in Ports |
|---|---|---|---|
| Mauritius | Baltic Sea | ||
| Mexico | Baltic Sea | ||
| Micronesia, Federated States of | Baltic Sea | ||
| Monaco | Baltic Sea | ||
| Montenegro | Baltic Sea | ||
| Morocco | Baltic Sea | ||
| Mozambique | Baltic Sea | ||
| Myanmar | Baltic Sea | ||
| Namibia | Baltic Sea | ||
| Nauru | Baltic Sea | ||
| Netherlands | Baltic Sea | 27 | |
| New Caledonia | Baltic Sea | ||
| New Zealand | Baltic Sea | 30 | |
| Nicaragua | Baltic Sea | ||
| Nigeria | Baltic Sea | ||
| Norway | Baltic Sea | 3 | |
| Oman | Baltic Sea | ||
| Pakistan | Baltic Sea | ||
| Palau | Baltic Sea | ||
| Palestine, State of | Baltic Sea |