The California sea lion has a unique way of moving through the ocean. This highly maneuverable aquatic mammal produces thrust primarily with its foreflippers – the ones it has where you have hands. Despite being fast, efficient and agile, this sea lion swimming technique is quite different from the way other large fish and marine mammals move through the water. It wouldn’t be easy to design a system from scratch that could match the sea lion’s specifications – they produce high levels of thrust.