A fisherman was shocked to find a crab with a full set of human-like teeth.
Roman Fedortsov, who works on a trawler in Murmansk in the northwest part of Russia, shared a picture of his bizarre discovery on Instagram and wrote: "Crabs…All the same, there is something attractive and repulsive in them. Mother Nature has tried…"
A number of horrified Instagram users commented, with one writing: "Human incisors from above," another joked: "Teeth like mine" and one person questioned: "Does he have human teeth?"
Roman often documents his strange discoveries on his Instagram account and has previously said that he found all of the fish fascinating and did not share believe that they were ugly monsters.
He said: "All kinds of fish are beautiful in their own way. I can not say that they are 'scary' or 'ugly'. People are very interested in unusual sea creatures.
"Readers have the impression that with each trawl we bring aboard unusual fish specimens. In fact, this is far from the case. It is a rarity.
"On the other hand, even a famous fish can be photographed so that it will seem to be a 'monster'. Most of the raised fish do not survive due to the difference in pressure."