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The most striking feature of the narval whale, also known as the narwhal or narwhal whale, is its spiral teeth of 2-3 meters that extend outwards like a spear in adult males.
These teeth, which are rarely seen in female individuals, extend by spiraling from the left side of the upper jaws of narval whales. This tooth has no function of attracting the attention of females or intimidating its opponent as it is thought. According to the research of Martin Nweeia of the Department of Dental Science at Harvard University, these spear teeth are actually a sense organ. More than 10 million nerve cells on the surface of the tooth are connected by a tunnel to the central nervous system. In this way, narvals can detect temperature and pressure changes in the water. Another feature of teeth is that they can stretch up to half a meter without breaking.
The habitat of Narval whales is Canada's Baffin Bay, Davis Strait and Hudson Bay in the Arctic Ocean. They are the only whale species that continuously spend their lives in the arctic region, including the winter season.