Class: Marine mammal.
Protection status: Endangered.
Life expectancy: 45 - 50 years.
Size: On average,14.6m long (males) and 18m long weighing up to 45 tonne (females).
Diet: Up to 1 tonne of food a day, including krill and other tiny animals such as a variety of small fish.
Life cycle: Maturity is reached at about 11.4m long (from 4 - 10 years).
Reproduction: Females calve once every 3 years, after a pregnancy of about 12 months.
Calves: A newborn calf is about 4.5m long and can weigh 1.5 tonne. When it is weaned at 11 months, it can be up to 9m long.