Courtship and procreative behavior in many species of elasmobranchs—cartilaginous fish including rays, sawfish, sharks, and skates—may include following and biting. However, there has been little ...

The spiraled tusk juts from the head and can grow as long at 10 feet. Unlike some whale species that migrate, narwhals spend their lives in the Arctic waters of Canada, Greenland, Norway and Russia.