Sleep in Mexican Cave Fish

There's lots of speculation that the reason there's variable sleep throughout the animal kingdom is because animals have different foraging needs. For example, if you're a large mammal like an elephant, you need to eat most of the day. And for that reason, elephants only sleep a few hours a night. Iwa just going to ask you that se eligans, as far down as we've gone, ye. I mean, i think seeligans have a very primitive nervous system. There's also hydra and jelly fish that have been identified or characterized for sleep. Well, maybe we should now shift gears to go deep into caves in mexico. You have done a lot of work