Definition. A fibroblast is a cell that manufactures and maintains connective tissue, the structural framework that supports the organs of all animals. Fibroblasts secrete fibrous proteins and ground substance, which together form the extracellular matrix that is the basis of connective tissue. fibroblast is a cell that manufactures and maintains connective tissue, the structural framework that supports the organs of all animals.
Therefore, there is very little chlorophyll in these tropical waters, keeping them clear. (As an aside, corals are symbioses where phytoplankton have evolved to survive in nutrient-poor tropical waters by living inside the bodies of the corals and obtaining nutrients directly from the waste products of the corals.
Home Managing the Reef How the Reef is managed Water quality in the Great Barrier Reef. Good water quality is the reason why the Great Barrier Reef is one of the most beautiful, diverse and complex ecosystems in the world. Reefs grow best in waters that have naturally low concentrations of nutrients (nitrogen and phosphorus) and sediments.