Greenland shark

The Greenland shark (Somniosus Microcephalus), also known as the Gurry shark, is the Northernmost shark species found in the North Atlantic of Canada, Greenland, Norway, and Iceland. Greenland sharks mostly eat fish but they sometimes catch seals and a few odd animals have been found in their stomachs including reindeer, moose, and even polar bears. Researchers shown that the Greenland shark is one of the longest lived vertebrates on Earth, living to be 200 years old. The flesh of the Greenland shark is poisonous and this is due to the presence of the toxin trimethylamine oxide, which, when eaten, breaks down into trimethylamine which produces effects similar to drunkenness. Yet, in spite of this, the Greenland shark is still popular food in Iceland and Greenland and in spite of the fact that the Greenland shark is really big and likes to eat marine mammals, and there are no attacks on humans. The reason is the water is just to cold to swim in. Many Greenland sharks have a strange and particular parasite attached to 1 or both corneas. It's a kind of copepod that eats the cornea tissue on Sleeper sharks and Greenland sharks. Nobody knows why this copepod goes after shark eyeballs, and even though it probably does affect the vision of the Greenland shark, it doesn't seem to keep them from being able to find food.