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Tropical Seas - Cala Gonone Aquarium
Coral reefs

Coral reefs are one of the richest ecosystems on the planet, which can be compared to the tropical rain forests, according to the variety of species.
Thousands of fish and invertebrates are among the corals shelter, nourishment and appropriate places to lay their eggs.
The most amazing fact is that these impressive structures are the result of the incessant activity of some tiny organisms that live there: the coral, also called hard corals for their ability to produce a rigid limestone.
They are colonial animals, composed of hundreds of thousands of very small polyps, connected to one another by a thin layer of tissue.
The corals have developed one of the most effective forms of symbiosis: they host within their tissues microscopic single-celled algae, the zooxanthellae. These, through photosynthesis, release organic substances that provide nourishment for about 80% of the total number of polyps. The zooxanthellae also facilitate the deposition of calcium carbonate, the raw material of construction of the cliff. The coral provides a safe haven algae and the compounds needed to perform photosynthesis.
In some parts of the world, the coral reefs have suffered great damage due to the constant temperature of the water, and the combined action of human activities.
There are several causes of this serious degradation, first of all unregulated development of coastal activities and deforestation, which cause an excessive amount of sediment and nutrients in ocean waters, often accompanied by chemical pollution.
 
 

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