This animation was inspired by "Hunting of the Snark," a poem by Lewis Carroll. He's the one who wrote the two Wonderland books.
If you have never read "The Hunting of the Snark" then I highly suggest you do. The little things in this animation will make a LOT more sense that way. Look it up on Dogpile or Google. Its easy to find. The design for the Snark and the Boojum are based off of American McGee's Alice.