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If ever there was an image that sums up the magic of diving, it is that of a coral reef. Although coral reefs are the most famous feature of tropical seas, these warm clear waters have much more to offer, such as mangrove swamps, sea-grass beds, and vast tracts of open ocean.
Warm Belt
Tropical waters occupy the region within the "20°C isotherm"―the irregular hand of water north and south of the equator that seldom drops below 68°F (20°C). Although undeniably appealing to the diver, they actually present a less attractive environment for marine life. The warm equatorial sun heats the upper layers of the water column, burberry orange creating a marked temperature difference between the surface water and deeper colder water. Such temperature stratification prevents mixing of the water column, so nutrients are not passed up from deeper water. Marine animals and plants have therefore had to adapt and evolve numerous strategies to cope with the lack of nutrients in the water around them. Perhaps the most remarkable of these is the coral reef. Primary production―the formation of organic compounds from inorganic material is up to 100 times greater in coral reefs than in orange burberry polo open tropical waters, and although they cover only 0.2 percent of the ocean environment, they are home to 25 - 30 percent of all fish species.
The reefs of the Indo-Pacific are the richest burberry shirts marine environments on Earth. Their beautiful structure and bright colors, combined with the splendor and variety of animals that inhabit them, make reefs irresistible to divers, and it is no coincidence that many of the world's best dive sites tire found on coral reefs.