Can a narwhal kill a shark?

Yes, sharks can eat Narwhals if their paths ever should cross. They're known to go after just about anything that gets their attention. In fact, it may be said that they're known to bite first and ask questions afterwards. For example, they bite humans, decide that they don't like human body parts, and spit them back out. But the main predators, the main threats to narwhals are hunters, killer whales [Orcinus orca], and polar bears [Ursus maritimus].