atoll
A tropical lagoon is encircled by an atoll.
atoll
At the center of an atoll is usually a lagoon, which is a body of water surrounded by a ring of coral reef. The lagoon can vary in size and depth depending on the specific atoll.
a lagoon
An atoll is an island of coral that partially or completely surrounds a lagoon.
A lagoon boundary is commonly referred to as a shoreline or edge where the lagoon meets the land.
a lagoon
A coral atoll.
A lagoon $$$$
The center of an atoll is typically a lagoon, which is a body of shallow water surrounded by a ring of coral reefs or islands. This lagoon is usually calm and can support diverse marine life due to its protected nature.
Atoll