Leatherbacks undertake the longest migrations between breeding and feeding areas of any sea turtle, averaging 3,700 miles each way. A team of scientists tracked 25 female leatherbacks using satellites. One of the migration routes were identified, one of which is 4,699 miles and goes straight across the South Atlantic from Africa to South America. The regions occupied contained high surface chlorophyll concentrations and the average sea surface temperature was 26 degrees Celsius. This group of sea turtles stayed within depths of 200 meters. Other routes lead to food-rich areas where the turtles go for 2-5 years to build up enough reserves to be able to reproduce.