A Wish About a Zebrafish

Here's a question that I wish to ask about a zebrafish No, not about how it looks -- I can use the Internet or books I want to know just how despite missing eyelids to block its sight this little fish of black and white manages to sleep at night So I looked and found some information regarding homeostatic regulation And if you ask me what that is I'll reply with this analysis We see in most land-based creatures this constantly occurring feature That if deprived of sleep one night animals tend to set it right They make up their sleep the next few rounds a trait the scientists call 'sleep rebound' And now I have some news for you -- That's precisely what zebrafish do As well, when asleep they float in place as if they're staring off into space They float horizontal or head up slightly and I learned, they do this nightly So, I'm happy that my wish was granted ~ and that zebrafish don't sleep slanted