http://www.guardian.co.uk/science/2007/oct/29/clam?gusrc=rss&feed=networkfront It lived over 400 years and some assholes killed it.
The oldest ever... Tree, bristlecone pine: USA: 4,844 (years) Fish, lake sturgeon: 154 Mammal: bowhead whale: 130 Human: Jeanne Calment: 122 Macaw: 106 Elephant: 78 Horse: 62 Japanese salamander: 55 Herring gull: 49 Bat: 32 Dog: 24 Rabbit: 18