most of the world's creepiest animals can be found near the bottom of the ocean, like these:
with that last one really looking like something from alien.
on land, i find the anteater pretty surreal: http://upload.wikimedia.org/wikipedia/commons/e/e5/NationalZooAnteater.JPG
look at that thing, how did that even happen.
and the capybara, which literally looks like a guinea pig from chernobyl: