This fish has a see-through forehead, and it watches the world through it.
Meet the barreleye, Macropinna microstoma. New footage shows it hovering in the dark with its whole head wrapped in a clear, fluid-filled dome.
Those two dots where you’d expect eyes? They’re nostrils. The real eyes are the glowing green orbs inside, and they can rotate to stare straight up through its own head or swivel forward to line up a meal.
It lives hundreds of meters down, where barely any sunlight gets through. So it scans overhead for the faint shadows of prey drifting above.
Scientists missed the shield for decades. Their nets kept destroying it.
