Narwhals live in the cold waters of the Arctic Ocean, near Greenland, Canada and Russia. They usually travel in groups of between five and20 individuals. Sometimes, in summer, groups merge with each other to form mega-pods of over 1000 narwhals.
Narwhals feed on fish including halibut and cod, as well as invertebrates like cuttlefish, shrimp and squid. They are believed to inhale their prey whole, as they lack teeth necessary for biting and chewing.
The function of the narwhal’s text is the cause of much speculation. It has been proposed that the whales use it to poke holes into sea ice for breathing, or that it is used to establish dominance and hierarchy among males. Males occasionally rub their tusks together, which was long believed to be a form of combat, though now it is thought to be a method of communication. They have also been observed using their tusks to stun fish to make them easier to feed on.