This forbidding tusk can serve as a weapon in disputes.
Narwhals have a cylindrical body, with a blunt head and small mouth.
The at-birth length of a calf is usually about 5 ft. Though measured in tons, Narwhals are far from whale heavweights. Mature males usually weigh about 1.8 tons, females somewhat lighter, around a ton. Young Narwhals are bluish gray in color, but adults are distinctively marked with leopard-like spots. The Narwhal diet consists mostly of squid, crabs, shrimps and fish.