There are deepwater reefs and shallow water reefs; sponge reefs can be extremely deep. However, the more commonly known tropical coral reefs are usually quite shallow, as many of the animals there rely on sunlight to survive.
deep!
The word is grief.
The word "grief" rhymes with "reef" and means deep sorrow or sadness.
boang boang
boang boang
In the deep coral of reefs
the deepest part is 200 ft
Little Deep, Mill Reef
Probably, seeing as it is the 'Great Barrier Reef', there might be some in the deep, dark depths of it!
A Barrier Reef. The barrier reefs grow parallel to the shore of an island and are separated from it by a deep lagoon.
How should I know
The Great Barrier Reef was named by Matthew Flinders, the first explorer to circumnavigate the Australian continent. Flinders named it this because the Great Barrier Reef is a coral reef specifically given the designation of 'barrier reef'. This means that the reef is separated from the coastline due to the water's depth being too deep.