A group of Australian scientists claim to have found the oldest living organism on the planet.

According to them, there is a patch of sea grass on the bottom of the Mediterranean Sea that spans almost 10 miles and weighs more than 6,000 tons. They believe this underwater meadow is the oldest living organism in the world.

Apparently they studied sea grass from a total of 40 underwater meadows, in an area spanning more than 2,000 miles, from Spain to Cyprus.

The analysis, published in the journal PLos ONE, found the sea grass was between 12,000 and 200,000 years old and was most likely to be at least 100,000 years old.

Meanwhile, the study also has revealed a list of, what they believe, are the other oldest living organisms in the world.

Check out the oldest living organisms here...