Largest fringing reef
Ningaloo Reef

Fringing reefs are those which occur right off the shoreline of a landmass, unlike a barrier reef, which occurs further out into the ocean, and often forms a lagoon. Ningaloo Reef, on the shore of Western Australia, extends for around 300 km (180 miles) in length and is just 100 m (330 ft) from the shore at its closest point.