Satellite telemetry can also be profitably used to track juvenile turtles that have not yet attained sexual maturity, provided that they have reached a sufficiently large size to allow the deployment of a satellite tag (generally around 50 cm curved carapace length at least, but there are cases of even smaller turtles have been tracked).  Such juveniles are thought to have a most variable spatial behaviour, for instance displaying nomadic movements over large oceanic areas or remaining for long time in spatially restricted neritic sites.

Our group has mostly tracked the movements of juvenile loggerheads of the Mediterranean Sea, relying on individuals that had been accidentally captured by fishermen. Juvenile green turtles residing in coastal waters of Northern Brazil have also been studied.