Corals are fascinating invertebrates belonging to a large group of intriguing & colourful animals called Cnidaria, including jelly fish and sea anemones. Each individual coral is called a polyp and live in large groups to form a colony. The most unique feature of corals is the highly evolved form of symbiosis. The polyps have developed this relationship with a microscopic single celled algae known as zooxanthellae. The symbiosis between plant and animal contribute to the brilliant colours of coral.
With Low & High Temperatures, light, nutrients, climate change and human destructive factors, the corals are stressed by these changes. They expel the symbiotic algae living in their tissues causing them to turn completely white. When corals bleach they are not dead, corals can survive bleaching, but they are under more stress and subject to mortality.
Corals are an indispensable part of the marine ecosystem. With global warming drastically affecting our coral reefs. It is more than ever necessary to have rigorous control on the adverse marine and terrestrial human activities that can easily cause harmful impacts on coral reefs.
Black & white pictures shot with a Nikon DSLR camera on the Black River Beach earlier this month.
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