Paradise, for some, is simply an empty beach on a Caribbean island. But for wild creatures this is not a destination, but a dividing line. Here the tranquil inland world comes to an end and a far more complex and surprising one begins. Vast coral reefs and sandy plains shimmer beneath the crystal Caribbean Sea. And the tropical sun illuminates an array of living jewels. Here are creatures rare and fantastic. Here are figments of our nightmares and flights of wonderful fancy from our dreams. In waters famed for hidden treasure, another kind of wealth is stunningly abundant. Here, immersed in beauty and subtle mystery, we now discover the JEWELS OF THE CARIBBEAN SEA. The largest living structures on planet Earth are controlled from outer space. Every year, with uncanny precision, the orbiting moon somehow sets in motion the process of spawning in coral reefs throughout the world. The same response occurs at different times in great coral reef systems from the Red Sea to the Pacific and greater Caribbean.