That's a great pic,about 2 km deep they say in this link
http://english.sina.com/p/1/2005/0729/40488.html
About 200m difference between the crater floor and the top of luquid stuff,
http://www.esa.int/SPECIALS/Mars_Exp...KA808BE_0.html
I wonder what sort of fish could be swimming around up there ?
