Sea Turtles

Sea turtles appeared on Earth about 150 million years ago. They had their origin on land, having evolved and differentiated from other reptiles during their adventure into the sea. Most turtles that existed in that era are now extinct. Those that survived have colonized all the oceans and gave rise to the various species, which roam the oceans around the world, and use the beaches in subtropical, tropical and temperate climates to reproduce.

Chelonia mydas	(Green turtle)

Turtles, or chelonians, are reptiles of the order Testudinata, which are characterized by having a body protected by a bony shell. While some remained in terrestrial environments, others sought freshwater or ventured out to sea, evolving and differentiating themselves from other reptiles.

Only seven species of sea turtles have survived:
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Turtles are long-lived species that show very particular behaviours. They spend most of their life at sea, although they migrate extensively. They are excellent navigators, undertaking journeys of hundreds of miles between their feeding and breeding grounds.
 
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Sea turtles face numerous threats. Their complex life cycle and migratory behaviour mean that each individual may use habitats on different countries and even different continents. Their protection, therefore, depends on a joint and continuous international effort, capable of protecting them from hatching to maturity, as well as conserving their feeding and breeding grounds. In the wild, only one to two hatchlings in a thousand will survive to adulthood, a process that can take about 30 years. Our challenge is to prevent the extinction of sea turtles by means of direct protection, research, and participative conservation programs in coastal communities.