With the exception of French Guiana, the outlying regions are islands or
island groups in mid-ocean. Though small, they give the EU vast tracts of
tropical and sub-tropical ocean. The Canary Islands, Madeira, the Azores,
French Guiana, Guadeloupe, and Martinique are all situated in the central
Atlantic, and Réunion in the Indian Ocean.
The outermost regions have few major ports, with the exception of Las Palmas (Canary Islands). But they do support a range of commercial activities, such as fishing and shipping, and are excellent locations for marine research and certain other innovatory activities.