They are called narwhals and they do still exist. They are an endangered species. My vote goes to frogfish. Those things are amazing at blending in and hiding themselves. They can move while eating so quickly that the human eye cannot keep up. It just looks like the shrimp in front of them disappeared into a cloud of kicked up sand. Those are some ugly/awesome creatures too.
<img src>http://education.uncc.edu/cpflower/images/Bonaire2004/frogfish.jpg</img src>