Category Archives: oceans

Harmful algae are microscopic, single-celled plants that live in the sea. Most species of algae or phytoplankton, usually, are not harmful. Rather they serve as the fundamental source of food for higher forms of life. Unfortunately, a small number of … Continue reading →

Reef formation The prime reef builders are the stony or hard corals (subphylum Anthozoa). Reefs are formed by the skeletons of the tiny coral polyps. A coral polyps consist of a fleshy sack with a ring of tentacles which sits … Continue reading →

There are several theories about how coral structures are formed. Charles Darwin originally described 3 major types of coral reefs. The first of these types is the fringing reef, an area along the shore where coral colonies have been able … Continue reading →