User: How long do hump back whales live?
Assistant: Hump back whales range is size from 14 - 17 meters, and can live 45 - 50 years.  They weight a staggering 40 metric tons or about 55,000 - 65,000 pounds.  They get their name hump back whale because of the shape of their back.  They are also a very friendly and non aggressive, and there is a very low chance of a human ever getting harmed who comes into contact with one.