Cuba is a tropical paradise. It is the largest and yet least known island in the Caribbean. In recent years it has become famous for its old American cars, Fidel Castro's brand of communism, cigars and rum. Millions of tourists visit each year to enjoy the tropical climate and the wonderful beaches and warm seas.But there is another Cuba, the little known wildlife of this Caribbean island. Over half the plants and animals are found nowhere else on earth. Over 80% of the reptiles and amphibians are uniquely Cuban. They include the smallest fourlegged animal on earth and the world's most aggressive crocodile. This programme looks at these little known creatures and investigates how they arrived on Cuba and when?The Story starts in the Caribbean Sea. Cuba has many unspoilt reefs that team with colourful fish. This is due in part to the recent communist regime, for there has been strict control over boats and very limited fishing.. So the reefs have remained pristine, a glimpse of how the rest of the Caribbean looked before development degraded so much.