About 1km off Nai Yang is a large reef at a depth of 10m to 20m.

Surrounding it are sandy beaches, perched on the northwest corner of a larger two square kilometer reef.

It is the largest reef in the Southern Gulf of Mexico.

The island is surrounded by two large reefs.

The aquarium also cultivates its own live coral, some of which can be seen on this large reef.

This atoll has a large reef with lagoon, 15 miles long by only 3 miles broad.

Seymour Tower sits two miles offshore on one of the largest inter-tidal reefs in the world.

The large reef was a convoluted, permanently submerged landscape.

The parts of the bridge that fell into the water below are now a large artificial reef.

All he noticed was the hump of a large reef off to the northwest, barely visible.