It would be so cool to get a sample of that water (assuming it does in fact exist) and see what type of life is in it (if any). It would be almost like seeing life from another planet.
> In the mantle, temperatures range between 500 to 900 °C (932 to 1,652 °F) at the upper boundary with the crust; to over 4,000 °C (7,230 °F) at the boundary with the core. [1]
Those would be some pretty extreme extremophiles!
> However, it is thought unlikely that microbes could survive at temperatures above 150 °C, as the cohesion of DNA and other vital molecules begins to break down at this point. [2]
Aww man! Though there are some pretty amazing extremophiles out there anyway!
