
Source: Zanthra / Getty Images
50. American alligator
> Oldest recorded: 77 years
> Average adult weight: 330.7 lbs.
> Habitat: Southern United States

Source: eco2drew / Getty Images
49. Sperm whale
> Oldest recorded: 77 years
> Average adult weight: 62,831.7 lbs.
> Habitat: All major ocean basins

Source: MogensTrolle / Getty Images
48. Gray whale
> Oldest recorded: 77 years
> Average adult weight: 62,831.7 lbs.
> Habitat: Northern Pacific Ocean
47. China rockfish
> Oldest recorded: 79 years
> Average adult weight: 2.0 lbs.
> Habitat: Northern Pacific Ocean
46. Andean condor
> Oldest recorded: 79 years
> Average adult weight: 23.1 lbs.
> Habitat: Pacific Coast of South America
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