Archipelago

An archipelago is a group of islands clustered together in a body of water. Geologically, they form from volcanic activity (Hawaii), continental shelf emergence (Japan), or coral reef growth (Maldives). Countries composed entirely of archipelagos are called archipelagic states.

The world's largest archipelagic state is Indonesia (about 17,508 islands), followed by Philippines (7,641) and Japan (14,125). Archipelagic nations have vast maritime territories, with their Exclusive Economic Zones often far exceeding their land area.

Very many islands suggests Indonesia, Philippines, or Japan. Coral reef archipelago points to Maldives, Marshall Islands, or Tuvalu.