What is the longest living mammal?
Some confirmed sources estimate bowhead whales to have lived at least 211 years of age, making them the oldest mammals. Rougheye rockfish can reach an age of 205 years. Specimens of the Red Sea urchin Strongylocentrotus franciscanus have been found to be over 200 years old.
Source: Wikipedia.
I asked for mammal, please. Those are not all mammals.
My mistake, though honestly you could have searched for the answer on Google. As far as I know, the longest living mammal is the bowhead whale.
The longest living mammal is is a bowhead whale, they're capable of living up to 200 years, which is longer than even humans can live on average.