Final answer:
Islands in the Antilles are surrounded by coral reefs and volcanic activity, creating a diverse marine ecosystem.
Explanation:
The islands in the Antilles are surrounded by coral reefs, which are a result of the islands being the tops of underwater mountains. These coral reefs provide habitats for a wide variety of marine life, including fish.
Many islands in the Lesser Antilles have volcanoes due to their formation along tectonic fault lines. For example, the last major eruption in the region occurred in Montserrat in 1995.
The ring-like atolls that form around lagoons in the Caribbean are typically made of coral and are often found in the Pacific Ocean.
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