Researchers found that the markings matched up perfectly with the mouthparts of a bizarre deep-sea fish.
"I had a hunch this might work but I was really surprised how well the head profile images matched the impressions. We were able to provide fairly good evidence that these impressions were made by two grenadier species," Stevens said.
Compilation of the mystery marks as seen on the seafloor. The marks are located off the coast of New Zealand, at a depth of around 1,600 feet.Rattails are found at depths of between 600 and 13,100 feet and have huge blue eyes evolved to detect traces of light. These fish feed on a variety of creatures, from smaller fish to crustaceans. The exact reason they make these marks on the seabed is unknown.
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