An odd fish with a see-through head has been snapped by boffins on a deep sea expedition.
The creature – known as a barreleye – was spotted a whopping 2,000 to 2,600 feet deep in Monterey Bay, off the coast of California.
It can grow up to six inches in length and hunts for prey in complete darkness, which explains why its eyes are so huge, reports The Sun.
Footage was captured using a remote-operated vehicle in the "twilight depths" of the ocean.
It was released by the Monterey Bay Aquarium Research Institute (MBARI).
The organisation said: "MBARI’s remotely operated vehicles Ventana and Doc Ricketts have logged more than 5,600 successful dives and recorded more than 27,600 hours of video—yet we’ve only encountered this fish nine times!
“Even in a world full of adaptations for seeing in near-total darkness, the barreleye fish stands out as one of the most bizarre… its eyes are two glowing green orbs behind its face that gaze up towards the top of its head.”
Originally, researchers thought the fish’s bizarre eyes could only see upwards – but they soon discovered the miraculous critter can rotate its eyes to see forward too.
"Its eyes look upwards to spot its favourite prey,” boffins continued.
“Usually small crustaceans trapped in the tentacles of siphonophores—from the shadows they cast in the faint shimmer of sunlight from above.
"But how does this fish eat when its eyes point upward and its mouth points forward? MBARI researchers learned the barreleye can rotate its eyes beneath that dome of transparent tissue."
The fascinating animal can be found all the way from the Bering Sea to Japan and Baja, California.
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It hovers below a siphonophore’s tentacles to steal food, researchers say.
But it isn’t the only weird creature spotted lurking in the murky depths of the ocean – recently, a tube-like animal with no eyes, ears or mouth shocked a group of divers.
The freaky fish was likened to a horror sci-fi monster by one eye-witness.
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