Whats the oldest animal on earth?

http://www.foxnews.com/story/0,2933,306076,00.html

here's your answer

Earth

Here's a link that will tell you all about it. A whole lot of info on the oldest living animal on earth, oldest known animal to have ever lived, etc...

http://lmgtfy.com/?q=What%27s+the+oldest+animal+on...

if you're speaking in terms of evolution, every species has been evolving for the same amount of time! A plankton is as "evolved" as a human

if you mean which has the longest lifespan, Greenland Sharks can live over 200 years, as do Bowhead whales, and a tiny oyster-like animal can live for 400 or more years.

I recently read that a zoo in the U.K. was transferring a sea turtle to a zoo in Australia. The animal was returned to the U.K. by Charles Darwin. It's age was estimated to be 250 years.

the turtle is the oldest animal

the oldest animal on earth is clam i think

Plankton

They have recently found large worms underwater of Antartica their age 4000 yrs old

the clams , they been around for over 4 billion years