If you look carefully, where Lucy's head should be, Nemo is sleeping perpendicular to Lucy's position. His head is under the blanket. At one point Lucy used Nemo's shell as a pillow.
But what I really think happened is that. while Lucy was sleeping in her igloo, I moved a piece of Lucy's cuttlebone stash near Nemo. Lucy is positioned directly on top of the cuttlebone. They are still in this position this morning.
This is the first photo where you can really see how much larger Lucy is than her older sibling. Poor Nemo started out a few ounces more. I don't think Nemo has a chance of getting to that cuttlebone.
