Odobenocetops was closely related to narwhals and 2.1 m (7 ft) long. It weighted between 150 and 650 kg. Its neck articulations show that it was very flexible, being able to turn its head over 90 degrees. It had tusks projecting towards the rear of its body.
It is thought that Odobenocetops was a bottom feeder, searching for mollusks and sucking them out of their shells with a powerful tongue.