I've read they don't spend time sleeping exactly like we do, one half of their brain sleeps at a time. So if at least part of why we need to sleep is so we can astrally project, then dolphins would have to do that some times as well, so does that mean dolphins could be pretty much constantly astrally projecting while also being awake as long as half of their brain is sleeping? Could they also get real-time sight from having half a brain asleep?