factnews._official on Instagram: "The narwhal’s tooth is considered the world’s largest animal tooth. This long, spiral tusk is actually an extended canine tooth that can grow up to 10 feet. Narwhals are found only in the icy waters of the Arctic Ocean, near Greenland, Canada, and Russia. Their bodies are specially adapted to survive extreme cold, with thick blubber and unique blood circulation. Because of these adaptations, narwhals cannot live in warm seas. Even slightly higher water temperatu