Is this color-changing octopus dreaming?

Are octopuses capable of dreaming?   This is what scientists have been trying to figure out after witnessing this amazing phenomenon.

Transcript

00:30This is a camouflage, like, she's just subdued a crab and now she's going to sit there and eat it, and she doesn't want anyone to notice her.

00:43It's a very unusual behavior to see the color come and go on her mantle like that.

00:50I mean, just to be able to see all the different color patterns just flashing one after another.

00:57You don't usually see that when an animal is sleeping, which really is fascinating.

01:27This is a camouflage, like, she's just subdued a crab and now she's going to sit there and eat it, and she doesn't want anyone to notice her.