This bizarre resident of the deep sea is certainly one of the most unique creatures we've ever seen. Imagine traveling through the darkest depths of the ocean around 2,000ft down where everything around you is pitch black. You shine your torch into the gloom and something catches your eye. As it gets closer, you realize that this is no ordinary fish - you can see straight through its head! Meet the barreleye fish (Macropinna microstoma) - a creature so bizarre that if there weren't pictures and videos of it you could almost believe that it was something completely made up....