Several attacks cause the neighboring family to die. Some corals secrete a poison into the water or secrete matter to make it impossible for larvas of different corals to settle in the same area. Fringing reefs live in shallow water and borders the coast. Barrier reefs are separated from land by a lagoon. They grow parallel to the coast and are vey large.
Atoll reefs are annular reefs that develop at or near the surface of the sea.
There are islands surrounding the reefs and a lagoon is present. Atool reefs are in the deep sea and on the continental shelf. Spring 2000, pp. Coral Reefs . Sea World strives to provide an enthusiastic, imaginative, and intellectually stimulating atmosphere to help all ages.