Discovery News brings you Macropinna microstoma:
The common name for the fish is “barreleyes.” Monterey Bay Aquarium Research Institute investigators recently figured out why this species has such an unusual head. Its eyes can actually rotate within its “skull,” so the transparency allows the wary swimmer to keep a literal eye on happenings above it, as well as to the sides and directly in front.
With that kind of vision, blueliners and brownliners alike might have a problem with this little guy. Break out the 9X tippet. And the camo waders!