- A
reef is a
ridge or
shoal of rock, coral, or
similar relatively stable material lying beneath the
surface of a
natural body of water. Many
reefs result...
- A
coral reef is an
underwater ecosystem characterized by
reef-building corals.
Reefs are
formed of
colonies of
coral polyps held
together by
calcium carbonate...
- Look up
reefing in Wiktionary, the free dictionary.
Reefing reduces the area of a sail,
usually by
folding or
rolling one edge of the
canvas in on itself...
- The
Great Barrier Reef is the world's
largest coral reef system,
composed of over 2,900
individual reefs and 900
islands stretching for over 2,300 kilometres...
-
scarp in
South Africa Great Barrier Reef or "The
Reef", the planet's
largest coral reef The
Reef or The
Reefs, a
former mansion in Newport,
Rhode Island, in...
-
island subsides, the
coral fringing reef becomes a
barrier reef that is
detached from the island. Eventually,
reef and the
small coral islets on top of...
- An
artificial reef (AR) is a human-created
freshwater or
marine benthic structure.
Typically built in
areas with a
generally featureless bottom to promote...
- manatee. The
Florida Reef is the only
living coral barrier reef in the
continental United States, and the third-largest
coral barrier reef system in the world...
- A
reef aquarium or
reef tank is a
marine aquarium that
prominently displays live
corals and
other marine invertebrates as well as fish that play a role...
- A
reef knoll is a
landform that
comprises an
immense pile of
calcareous material that had
previously ac****ulated on an
ancient sea floor.
Reef knolls are...
