SIZE
Length: Up to 16 feet, from head to tail
Weight: 1.6 to 4 tons (4,000 to 6,000 pounds)
Weight at birth: 88 to 132 pounds (40 to 60 kilograms)
LIFE SPAN
About 50 years
YOUNG
Gestation: 16 months
Number of young at birth: One
Age of maturity: 6.5 to 7 years for females; 10 to 12 years for males
