Definition of EEZ: an exclusive economic zone (EEZ) is a seazone over which a state has special rights over the exploration and use of marine resources...generally extends 200nm from coastal baselines
An EEZ can be named after the country itself or after various territories, constituent countries, regions, etc. A handful of Joint EEZ's were not considered as they would've been impossible to guess (i.e. Colombia-Jamaica).
If the Hint is "Country" the name sought is the name of the country itself - i.e. the mainland's surrounding EEZ water area.
There were 230+ in the list however I dropped the largest of the group that were simply the countries themselves (i.e. Russia), but did leave smaller EEZ's which are part of them.