Corals need access to sunlight (the algae living in their cells need light for photosynthesis) so the water where they grow needs to be shallow and clear. Too much sediment in the water can smother the coral polyps and too much fresh water kills them.
Corals seem to grow best where the water is warm and shallow. They also like clear, sunny and unsettled water in order to bring in the nutrients they require to grow. The process of a water course flowing involves erosion that takes rocks, stones, sand and particles downstream. When rivers come into contact with the sea, the rivers are generally flowing fairly slowly and this is when the smaller particles are in suspension. River Deltas commonly form as a result. Corals do flourish where there is a high concentration of particles, because they are not very nutritious (mainly composed of rock particles) and they also tend to block out the light. So the mouth of rivers may represent warm, shallow and unsettled water (3 out of the 5 criteria), but they don't represent clear or sunny environments.
because it is an U shaped island with coral reefs surrounding it
Coral Reefs
no dolphins are not in coral reefs.
There are no coral reefs IN California
The reason they are called Coral Reef is because there are lots of coral in those locations, and they are also called coral reefs or reefs of coral reefs of coral too.
are coral reefs can be gas of ships?
Coral reefs are being killed by pollutants.
Pollution is a natural threat to coral reefs.
Coral reefs are deteriorating mostly because of our pollution
there is not wind considering coral reefs is underwater
Coral reefs are located in warm and shallow places.
Yes, there are many animals and creatures in the coral reefs.