Did you know that dolphins (Delphinus delphis) can sleep in motion? Dolphins engage in a form of rest called unihemispheric sleep, where they shut down half of their brain to rest; the other half stays awake at a low level of alertness to watch for predators, obstacles and other animals. This incredible footage shows two dolphins being guided by a third dolphin as they rest. 🎥 Robby and Lorien (@globetrottingbaes) #ausgeo #ocean #sealife #underwaterphotography #rays #shark #nature #naturephotog