You should be able to tell by the big eared guy that this is a Disney based stamp. This also allows the Nautilus in the background to have the same overall look as the movie including the pet seal of Nemo's and the same looking squid.
20,000 Leagues...the League of Extraordinary Gentlemen
In Alan Moore's The League of Extraordinary Gentlemen, he wrote and Kevin O'Neil drew a very specific Nemo.
We are to believe that the story takes place sometime after the events in Jules Verne's tale, and we see a side of Nemo because of it. Nemo seems to have not been the same after his encounter with the monster of the deep and everything he has reflects that.
Ala a Where's Waldo? book, see if you can find the ceph hidden in this picture of Nemo's submarine.
...and you probably don't want your eye too near it at first.
This is a Disney piece that is highly reminiscent of the Nautilus itself with the bronze look of the iron plates, rivets, and the several brass circles that the Disney Imagineers built into the hull. However, when one looks into the eye of this, they see not the tranquility of the sea, but a monstrous denizen from the deadly depths.
As they are often classified with children's literature (I am not quite sure why), they often have wonderfully evocative covers. Notice the swimming partner this guy has.
It's funny. People are so protective of their children, yet there are many pieces of art out there for childrens' books that are a little scary. Nacy drwe, Hardy boys and the like always had scary covers.
Personally, I think it's healthy. Kids like to be scared a little. Isn't that why we get on rollercoasters?